@article {2601, title = {Facile synthesis of dicyanovinyl-di(meso-aryl)dipyrromethenes via a dipyrromethene-DDQ adduct}, journal = {Organic \& Biomolecular Chemistry}, volume = {7}, number = {10}, year = {2009}, note = {ISI Document Delivery No.: 442UHTimes Cited: 1Cited Reference Count: 16Shin, Ji-Young Patrick, Brian O. Dolphin, David}, pages = {2032-2035}, type = {Article}, abstract = {The dicyano-substituted vinyl dipyrromethene 4 and compound 5 are near-planar and were prepared from a simple meso-aryl dipyrromethane via the DDQ adduct 3; the unique structures of 3, 4 and 5 were confirmed by X-ray diffraction analysis.}, keywords = {CORROLES, OXIDATION, porphyrins, PYRROLE}, isbn = {1477-0520}, url = {://000265865600005}, author = {Shin, J. Y. and Patrick, B. O. and Dolphin, D.} } @article {2168, title = {The complexes: RhCl(P-N)(THP), where P-N is P,N-chelated o-diphenylphosphino-N,N-dimethylaniline and THP is tris(hydroxymethyl)phosphine, and RhCl[(O)P-N][THP(O)] containing O-bonded phosphine oxides}, journal = {Inorganica Chimica Acta}, volume = {361}, number = {11}, year = {2008}, note = {ISI Document Delivery No.: 323VATimes Cited: 3Cited Reference Count: 42Lorenzini, Fabio Patrick, Brian O. James, Brian R.}, month = {Jul}, pages = {3199-3204}, type = {Article}, abstract = {{The complex RhCl(P-N)(THP) (1) is synthesized under argon from RhCl(cod)(THP) and P-N, and is structurally characterized; P-N = P, N-chelated o-diphenylphosphino-N,N-dimethylaniline}, keywords = {BEARING O-N, BIDENTATE PHOSPHINES, CATALYTIC-OXIDATION, HYDROFORMYLATION, LIGANDS, LOW-TEMPERATURE, N-DIMETHYLANILINYL SUBSTITUENTS, OXIDATION, PALLADIUM(II) COMPLEXES, phosphanes, phosphine oxides, phosphines, REACTIVITY, RHODIUM COMPLEXES, RHODIUM(I) COMPLEXES, X-ray structure}, isbn = {0020-1693}, url = {://000257475300029}, author = {Lorenzini, F. and Patrick, B. O. and James, Brian R.} } @article {2183, title = {Intraannular Savige-Fontana reaction: One-step conversion of one class of monocyclic peptides into another class of bicyclic peptides}, journal = {Chemistry-a European Journal}, volume = {14}, number = {11}, year = {2008}, note = {ISI Document Delivery No.: 291XITimes Cited: 1Cited Reference Count: 34May, Jonathan P. Perrin, David M.}, pages = {3404-3409}, type = {Article}, abstract = {Cyclisation and cross-linking strategies are important for the synthesis of cyclic and bicyclic peptides. These macrolactams are of great interest due to their increased biological activity compared to linear analogues. Herein, we describe the synthesis of a cyclic peptide containing an Hpi toxicophore, reminiscent of phakellistatins and omphalotins. The first intraannular cross-linking of such a peptide is then presented: using neat TFA to catalyse a Savige-Fontana tryptathionylation, the Hpi-containing peptide is converted to a bicyclic amatoxin analogue. As such, this methodology represents an efficient cyclisation method for cross-linking peptides and exposes a heretofore unrealised relationship between two different classes of peptide natural products. This finding increases the degree of potential chemical space for library generation.}, keywords = {2-CHLOROTRITYL CHLORIDE, 2-THIOETHER DERIVATIVES, amatoxin, ANALOGS, CROSS-LINKING, CYSTEINE SULFHYDRYL-GROUPS, ILE3-AMANINAMIDE, indole, ISOPHAKELLISTATIN-3, natural products, OXIDATION, PEPTIDES, PHALLOTOXINS, RNA POLYMERASE-II, TRYPTOPHAN}, isbn = {0947-6539}, url = {://000255230200019}, author = {May, J. P. and Perrin,David M.} } @article {1326, title = {The effect of pH and role of Ni2+ in zinc phosphating of 2024-Al alloy. Part I: Macroscopic studies with XPS and SEM}, journal = {Applied Surface Science}, volume = {253}, number = {2}, year = {2006}, note = {ISI Document Delivery No.: 114DVTimes Cited: 10Cited Reference Count: 30Akhtar, A. S. Wong, K. C. Mitchell, K. A. R.}, month = {Nov}, pages = {493-501}, type = {Article}, abstract = {Coatings formed on 2024-T3 aluminum alloy were studied by X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM) after dipping in zinc phosphating (ZPO) baths at different acidities, for different lengths of time, and with or without Ni2+ additive. The overall objective was to learn more about the role of Ni2+ on the ZPO coating mechanism, particularly since this additive is believed to improve corrosion protection for the Al alloy. Secondary phosphates dominate the coatings when the Ni-containing solution is adjusted to starting pH values of either 3 or 5, while tertiary phosphate is predominant at pH 4. AlF3 precipitates during the early stages of the coating process. Ni2+ has two main roles in the mechanism. First, the rate of increase in local solution pH is retarded by the slower kinetics of reactions involving Ni2+ compared to Zn2+,leading to thinner ZPO coatings when Ni2+ is present in the coating solution. Second, most Ni2+ deposition occurs during the later stages of the coating process, by nickel phosphate deposition and/or by formation of a Ni-rich oxide. (c) 2006 Elsevier B.V. All rights reserved.}, keywords = {ALKALINE STABILITY, aluminum alloy, ALUMINUM-ALLOY, CATALYSTS, COATINGS, CONVERSION COATINGS, FILMS, Ni2+ additive, NICKEL, OXIDATION, photoelectron spectroscopy, scanning electron microscopy, SPECTROSCOPY, STEEL, zinc phosphate}, isbn = {0169-4332}, url = {://000242647800017}, author = {Akhtar, A. S. and Wong, K. C. and Mitchell, K. A. R.} } @article {1142, title = {Palladium(II) complexes of bis(phosphine)monooxide and bis(phosphine)monosulphide ligands bearing o-N,N-dimethylanilinyl substituents}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {83}, number = {6-7}, year = {2005}, note = {ISI Document Delivery No.: 963UVTimes Cited: 3Cited Reference Count: 49}, month = {Jun}, pages = {546-552}, type = {Article}, abstract = {{Palladium( II) complexes of bis( phosphine) monooxide and bis( phosphine) monosulphide ligands with the general formula Ar2P( CH2) P-n( E) Ar-2 are described ( n = 1 ( dmapmE)}, keywords = {ARYL HALIDES, BIPHOSPHINE MONOXIDE LIGANDS, BISPHOSPHINE LIGANDS, CATALYSIS, CHEMISTRY, CHIRAL DIPHOSPHINE, COORDINATION, CROSS-COUPLING REACTIONS, DONOR, OXIDATION, palladium, phosphine, phosphine oxide, phosphine sulphide, PHOSPHINE-LIGANDS}, isbn = {0008-4042}, url = {://000231832500007}, author = {Jones, N. D. and James, Brian R.} } @article {1282, title = {Pre-treatments applied to oxidized aluminum surfaces to modify the interfacial bonding with bis-1,2-(triethoxysilyl)ethane (BTSE) - Part I. High-purity Al with native oxide}, journal = {Applied Surface Science}, volume = {252}, number = {5}, year = {2005}, note = {ISI Document Delivery No.: 993WHTimes Cited: 5Cited Reference Count: 39}, month = {Dec}, pages = {1293-1304}, type = {Article}, abstract = {A remote microwave-generated H-2 plasma and heating to 250 degrees C were separately used to modify high-purity oxidized aluminum surfaces and to assess whether these treatments can help enhance adhesion with bis-1,2-(triethoxysilyl)ethane (BTSE) coatings. Different initial oxide surfaces were considered, corresponding to the native oxide and to surfaces formed by the Forest Products Laboratory (FPL) treatment applied for either 15 or 60 min. BTSE is applied from solution at pH 4, and competing processes of etching, protonation (to form OH groups) and coupling (to form Al-O-Si interfacial bonds) occur at the solid-liquid interface. Scanning electron microscopy (SEM) was used to determine how the topographies of the modified Al surfaces changed with the different pre-treatments and with exposure to a buffer solution of pH 4. Secondary-ion mass spectrometry (SIMS) was used to determine the direct amount of Al-O-Si interfacial bonds by measuring the ratio of peak intensities 71-70 amu, while X-ray photoelectron spectroscopy (XPS) was used to determine the overall strength of the silane coating adhesion by measuring the Si 2p signals before and after application of an ultrasonic rinse to the coated sample. Measured Al 2p and O 1s spectra helped assess how the different pre-treatments modified the various Al oxidized surfaces prior to BTSE coating. Pre-treated samples that showed increased Al-O-Si bonding after BTSE coating corresponded to surfaces, which did not show evidence of significant etching after exposure to a pH 4 environment. This suggests that such surfaces are more receptive to the coupling reaction during exposure to the BTSE coating solution. These surfaces include all H-2 plasma-treated samples, the heated native oxide and the sample that only received the 15 min FPL treatment. In contrast, other surfaces that show evidence of etching in pH 4 environments are samples that received lower amounts of Al-O-Si interfacial bonding. Overall, heating improved the BTSE adhesive bonding for the native Al oxide, while H-2 plasma treatment improved the BTSE bonding for surfaces that had initially been FPL-treated for 15 and 60 min. (c) 2005 Elsevier B.V All rights reserved.}, keywords = {aluminum, ESCA, OXIDATION, PARALLEL FACTOR-ANALYSIS, silane adsorption, SILANE COUPLING AGENTS, SIMS, SPECTROSCOPY, surface pre-treatment, THIN-FILMS, TOF-SIMS, X-ray photoelectron, XPS, XPS INVESTIGATIONS, ZIRCONIUM-OXIDE}, isbn = {0169-4332}, url = {://000233985900014}, author = {Teo, M. and Kim, J. and Wong, P. C. and Wong, K. C. and Mitchell, K. A. R.} } @article {748, title = {Adsorption of BTSE and gamma-APS organosilanes on different microstructural regions of 2024-T3 aluminum alloy}, journal = {Applied Surface Science}, volume = {207}, number = {1-4}, year = {2003}, note = {ISI Document Delivery No.: 655URTimes Cited: 30Cited Reference Count: 34}, month = {Feb}, pages = {40-50}, type = {Article}, abstract = {The adsorption of bis-1,2-(triethoxysilyl)ethane (BTSE) and gamma-aminopropyltriethoxysilane (gamma-APS) has been studied on 2024-T3 aluminum alloy samples using scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) spectroscopy. The thickness and coverage of the BTSE film formed on a mechanically polished sample was found to be strongly affected by the distribution of second-phase particles on the alloy surface. Specifically, although the adsorption occurs on the alloy matrix away from the particles, and on the particles themselves, the regions immediately surrounding the particles had less BTSE. The amounts of this adsorption on an air-oxidized sample is increased on average, although the coating is non-uniform with regions (similar to100 mum) of higher and lower coverages. There appears to be a competition between the silane deposition and etching of the underlying oxide film for the initially oxidized sample. The adsorption of gamma-APS is different with films of relatively even thickness formed over large areas of the polished sample; hydrogen bonding through the amino groups probably helps the distribution in this case. (C) 2002 Elsevier Science B.V. All rights reserved.}, keywords = {aluminum alloy, DISSOLUTION, iron, metals, OXIDATION, PAINT ADHESION, PARTICLES, PITTING CORROSION, silane adsorption, SURFACE, surface microstructure}, isbn = {0169-4332}, url = {://000181571500007}, author = {Susac, D. and Sun, X. and Mitchell, K. A. R.} } @article {776, title = {Ni(III) complex of an N-confused porphyrin inner C-oxide}, journal = {Inorganic Chemistry}, volume = {42}, number = {25}, year = {2003}, note = {ISI Document Delivery No.: 752LRTimes Cited: 21Cited Reference Count: 15}, month = {Dec}, pages = {8125-8127}, type = {Article}, abstract = {{novel, structurally characterized Ni(III) complex of an N-confused porphyrin inner C-oxide has been synthesized from the oxidation of a Ni(II) N-confused porphyrin using OsO4. Crystal data: C53H40N5NiO.CH2Cl2, monoclinic, space group P2/a (No. 13)}, keywords = {CHEMISTRY, ISOMER, METALLOPORPHYRINS, NICKEL(II), OXIDATION, STRUCTURAL CHARACTERIZATION}, isbn = {0020-1669}, url = {://000187162900002}, author = {Xiao, Z. W. and Patrick, B. O. and Dolphin, D.} } @article {753, title = {Synthesis of the hemin of beta-tetrakis(trifluoromethyl)-meso-tetraphenylporphyrin and its evaluation as a P-450 mimic}, journal = {Inorganica Chimica Acta}, volume = {346}, year = {2003}, note = {ISI Document Delivery No.: 660EJTimes Cited: 4Cited Reference Count: 24}, month = {Mar}, pages = {261-264}, type = {Article}, abstract = {The hemin of beta-tetrakis(trifluoromethyl)-meso-tetraphenylporphyrin has been synthesized. Conventional methods for iron insertion failed; iron in low oxidation states (0 or II) brought about reduction of the macrocycle and Fe(III) failed to insert. Thus, insertion of iron into the macrocycle required the formation of the lithium complex, from lithium bis(trimethylsilyl)amide, followed by ferrous chloride. The novel hemin was tested as a catalyst for oxidations of cyclohexane and cyclohexene using iodosylbenzene as an oxidant and was found to be ineffective. (C) 2002 Elsevier Science B.V. All rights reserved.}, keywords = {CATALYSIS, CATALYSTS, cytochrome P-450, ELECTROCHEMISTRY, METALLOPORPHYRINS, OXIDATION, PORPHYRIN, porphyrins, POSITIONS, POTENTIALS}, isbn = {0020-1693}, url = {://000181820600033}, author = {Terazono, Y. and Dolphin, D.} } @article {5111, title = {Characterization of aluminum surfaces after different pretreatments and exposure to silane coupling agents}, journal = {Surface Review and Letters}, volume = {8}, number = {1-2}, year = {2001}, note = {ISI Document Delivery No.: 424EFTimes Cited: 11Cited Reference Count: 34}, month = {Feb-Apr}, pages = {43-50}, type = {Article}, abstract = {X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and scanning electron microscopy (SEM) have been used to characterize surfaces of aluminum which have been pretreated by mechanical polishing, acid etching and alkaline etching, as well as given subsequent exposures to air and water. These surfaces can differ markedly with regard to their chemical compositions and topographical structures. Characterizations of these surfaces after exposures to three organosilanes, gamma -GPS, BTSE and gamma -APS, indicate that the amount of silane adsorbed in each case shows a tendency to increase both with the number of OH groups detected at the oxidized aluminum and with the surface roughness. The XPS data are consistent with the adhesion of gamma -APS occurring through H bonding, especially via NH3+ groups.}, keywords = {ADHESION, DURABILITY, GROWTH, INTERFACES, OXIDATION, OXIDE, photoelectron, THIN-FILMS, XPS}, isbn = {0218-625X}, url = {://000168218600007}, author = {Kono, M. and Sun, X. and Li, R. and Wong, K. C. and Mitchell, K. A. R. and Foster, T.} } @article {5225, title = {Reaction of human myoglobin and nitric oxide - Heme iron or protein sulfhydryl (S) nitrosation dependence on the absence or presence of oxygen}, journal = {Journal of Biological Chemistry}, volume = {276}, number = {6}, year = {2001}, note = {ISI Document Delivery No.: 401HBTimes Cited: 33Cited Reference Count: 58}, month = {Feb}, pages = {3991-3998}, type = {Article}, abstract = {The amino acid sequence of human myoglobin (Mb) is similar to other mammalian Mb except for a unique cysteine residue at position 110 (Cys(110)). Anaerobic treatment of ferrous forms of wild-type human Rib, the C110A variant of human Mb or horse heart Mb, with either authentic NO or chemically derived NO in vitro yields heme-NO complexes as detected by electron paramagnetic resonance spectroscopy (EPR). By contrast, no EPR-detectable heme-NO complex was observed from the aerobic reactions of NO and either the ferric or oxy-Mb forms of wild-type human or horse heart myoglobins, Mass analyses of wild-type human Mb treated aerobically with NO indicated a mass increase of similar to 30 atomic mass units (i.e,, NO/Mb = 1 mol/mol), Mass analyses of the corresponding apoprotein after heme removal showed that NO was associated with the apoprotein fraction. New electronic maxima were detected at A(333) nm (epsilon = 3665 +/- 90 mol(-1) cm(-1); mean +/- S.D.) and A(545) nm (epsilon = 44 +/- 3 mol(-1) cm(-1)) in solutions of S-nitrosated wild-type human Mb (similar to S-nitrosoglutathione), Importantly, the sulfhydryl S-H stretch vibration for Cys(110) measured by Fourier transform infrared (nu similar to 2552 cm(-1)) was absent for both holo- and apo- forms of the wild-type human protein after aerobic treatment of the protein with NO. Together, these data indicate that the reaction of wild-type human Mb and NO yields either heme-NO or a novel S-nitrosated protein dependent on the oxidation state of the heme iron and the presence or absence of dioxygen.}, keywords = {ELECTRON-SPIN-RESONANCE, GLUTATHIONE, HEMOGLOBIN, HUMAN SKELETAL-MUSCLE, METMYOGLOBIN, NITROSOTHIOLS, OXIDATION, RELAXING FACTOR, SMOOTH-MUSCLE, VASCULAR TONE}, isbn = {0021-9258}, url = {://000166921200038}, author = {Witting, P. K. and Douglas, D. J. and Mauk, A. G.} } @article {4733, title = {Organometallic oxides: preparation of the cluster [(eta-C5Me5)Mo](4)O-7 by reduction of [(eta-C5Me5)MoCl(O)](2)(mu-O) or (eta-C5Me5)MoCl2(O)}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {78}, number = {3}, year = {2000}, note = {ISI Document Delivery No.: 296TVTimes Cited: 5Cited Reference Count: 63}, month = {Mar}, pages = {383-394}, type = {Article}, abstract = {Reduction of [(eta-C5Me5)MoCl(O)](2)(mu-O) or (eta-C5Me5)MoCl2(O) with sodium or magnesium amalgam, magnesium turnings, or tributyltin hydride produced [(eta-C5Me5)Mo](4)O-7, with [(eta-C5Me5)Mo(O)(mu-O)](2) as a co-product. [(eta-C5Me5)Mo](4)O-7 was characterized by X-ray diffraction, mass spectrometry, H-1 NMR and IR spectroscopies, and magnetism. Crystals of [(eta-C5Me5)Mo](4)O-7 contained a tetrahedral [(eta-C5Me5)Mo](4) unit (Mo-Mo = 2.909 (3) Angstrom) with the Mo4O7 core having the structure Mo-4(mu(2)-O(b))(3)(mu(2)-O(c))(3)(mu(3)-O(a)) (3). Microcrystalline samples of [(eta-C5Me5)Mo](4)O-7 were paramagnetic over the temperature range 2-300 K, with an effective moment of 1.26 mu(B) at 300 K. [(eta-C5Me5)Mo](4)O-7 was also paramagnetic in chloroform solution, over the temperature range 223-298 K, with an effective moment of 1.43 mu(B) at 298 K. The H-1 NMR spectrum showed a broad resonance at 16.3 ppm (delta nu(1/2) = 113 Hz) and two narrow resonances at 1.89 ppm and 1.69 ppm (delta nu(1/2) = 5 Hz). The magnetism and NMR spectra showed that [(eta-C5Me5)Mo](4)O-7 existed in two forms which were in equilibrium in solution. One form was paramagnetic (S = 1), with the Mo4O7 core having the geometry 3, and the other was diamagnetic (S = 0), with the Mo4O7 core having the geometry 4.}, keywords = {CARBONYL-COMPLEXES, CHARGE-TRANSFER SALTS, CLUSTER, CRYSTAL-STRUCTURES, CYCLOPENTADIENYL, ELECTRONIC-STRUCTURE, MOLECULAR-STRUCTURE, MOLYBDENUM, OXIDATION, OXIDE, OXO, OXYGEN, paramagnetism, X-RAY}, isbn = {0008-4042}, url = {://000086043200009}, author = {Bottomley, F. and Sanchez, V. and Thompson, R. C. and Womiloju, O. O. and Xu, Z. Q.} } @article {4978, title = {Reaction of human myoglobin and H2O2 - Involvement of a thiyl radical produced at cysteine 110}, journal = {Journal of Biological Chemistry}, volume = {275}, number = {27}, year = {2000}, note = {ISI Document Delivery No.: 332QGTimes Cited: 55Cited Reference Count: 52}, month = {Jul}, pages = {20391-20398}, type = {Article}, abstract = {The human myoglobin (Mb) sequence is similar to other mammalian Mb sequences, except for a unique cysteine at position 110. Reaction of wild-type recombinant human Mb, the C110A variant of human Mb, or horse heart Mb with H2O2 (protein/H2O2 = 1:1.2 mol/mol) resulted in formation of tryptophan peroxyl (Trp-OO.) and tyrosine phenoxyl radicals as detected by EPR spectroscopy at 77 K. For wild-type human Mb, a second radical (g similar to 2.036) was detected after decay of Trp-OO. that was not observed for the C110A variant or horse heart Mb. When the spin trap 5,5-dimethyl-1-pyrroline N-oxide (DMPO) was included in the reaction mixture at protein/DMPO ratios less than or equal to 1:10 mol/mol, a DMPO adduct exhibiting broad absorptions was detected. Hyperfine couplings of this radical indicated a DMPO-thiyl radical. Incubation of mild-type human Mb with thiol-blocking reagents prior to reaction with peroxide inhibited DMPO adduct formation, whereas at protein/DMPO ratios greater than or equal to 1:25 mol/mol, DMPO-tyrosyl radical adducts were detected. Mass spectrometry of wild-type human Mb following reaction with H2O2 demonstrated the formation of a homodimer (mass of 34,107 +/- 5 atomic mass units) sensitive to reducing conditions. The human Mb C110A variant afforded no dimer under identical conditions. Together, these data indicate that reaction of wild-type human Mb and H2O2 differs from the corresponding reaction of other myoglobin species by formation of thiyl radicals that lead to a homodimer through intermolecular disulfide bond formation.}, keywords = {ASCORBATE, CROSS-LINKING, enzyme catalysis, HEMOGLOBIN, HYDROGEN-PEROXIDE, LOW-DENSITY-LIPOPROTEIN, METMYOGLOBIN, OXIDATION, SPERM WHALE MYOGLOBIN, SPIN ADDUCTS}, isbn = {0021-9258}, url = {://000088084500025}, author = {Witting, P. K. and Douglas, D. J. and Mauk, A. G.} } @article {4215, title = {Formation of a meso-tetraphenylsecochlorin and a homoporphyrin with a twist}, journal = {Journal of Organic Chemistry}, volume = {63}, number = {7}, year = {1998}, note = {ISI Document Delivery No.: ZH679Times Cited: 40Cited Reference Count: 41}, month = {Apr}, pages = {2094-2098}, type = {Article}, abstract = {The osmium tetroxide-mediated dihydroxylation of meso-tetraphenylporphyrin leads to the formation of the vic-diol meso-tetraphenyl-2,3-vic-diol-2,3-chlorin. The corresponding Ni(II) complex was converted by lead tetraacetate into (meso-tetraphenyl-2,3-secochlorinato-2,3-dialdehyde)nickel(II) This novel pigment undergoes an almost quantitative, intramolecular double acetal formation when treated with methanol in the presence of acid to produce a porphyrinoid in which one pyrrolic unit is formally replaced by a six-membered ring. An X-ray crystal structure determination, the first for such a homoporphyrin, reveals the severely twisted conformation of its chromophore.}, keywords = {beta, CHLOROPHIN, HYDROPORPHYRINS, OXIDATION, PORPHYRIN ANALOG, SYSTEM}, isbn = {0022-3263}, url = {://000073136500012}, author = {Bruckner, C. and Rettig, S. J. and Dolphin, D.} } @article {4302, title = {Platinum(II)-silver(I) polymers bearing platinum(II) clusters containing chelated P,P- and bridged P, N-2-pyridylphosphine ligands}, journal = {Journal of Cluster Science}, volume = {9}, number = {3}, year = {1998}, note = {ISI Document Delivery No.: 168QATimes Cited: 6Cited Reference Count: 32}, month = {Sep}, pages = {243-258}, type = {Article}, abstract = {Reactions of PtI2L (L = P,P-bonded 1,2-bis(2-pyridyl )phosphino)ethane, d(py)pe, or 1,2-bis((2-pyridyl)phosphino)cyclopentane, d(py)pcp) with excess AgNO3 in acetic acid/ethanol afford the polymers [Pt-2(d(py)pe)(2)Ag-4(NO3)(8) (H2O)(2)](n) (1) and [Pt-2(d(py)pcp)(2) Ag-6(NO3)(10)](n) (2), respectively, which contain Pt2L24+ cores with each L ligand now P,N-bridging two Pt-atoms; these Pt-2 cores are connected via bridging AgNO3 clusters, the Ag being bound to the pyridyl-N or nitrate-O atoms. X-ray crystallographic data reveal Pt-Pt contacts of similar to 2.76 Angstrom indicative of bonding.}, keywords = {2-PYRIDYL, 2-PYRIDYLPHOSPHINE LIGANDS, =, cation, COMPLEXES, CRYSTAL-STRUCTURE, DIMER, METAL-METAL BOND, OXIDATION, palladium, platinum, pyridylphosphine, silver, SPECTROSCOPY, TETRAKIS(DITHIOACETATO)DIPLATINUM(II)}, isbn = {1040-7278}, url = {://000078702700004}, author = {Jones, N. D. and Rettig, S. J. and James, Brian R.} } @article {4403, title = {SIMS studies of the effect of H at interfaces formed by oxidized zirconium}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {76}, number = {12}, year = {1998}, note = {ISI Document Delivery No.: 180RKTimes Cited: 2Cited Reference Count: 13}, month = {Dec}, pages = {1796-1799}, type = {Article}, abstract = {Secondary ion mass spectrometry (SIMS) has been used to guide the search for an oxidation procedure that can produce a thin and relatively sharp oxide layer on macroscopic zirconium. A new preparation based on dip coating in H2O2 solution is indicated to be suitable for this purpose. SIMS further indicates that the oxide interface, for such a prepared sample, shows substantial degradation when it is heated in H-2 gas at 300 degrees C. The presence of H appears to facilitate O migration into the metallic region, an observation that supplements those made previously on oxidized thin-film samples of zirconium prepared by deposition under ultrahigh-vacuum conditions.}, keywords = {electron, GROWTH, HYDROGEN, interfacial reactivity, OXIDATION, OXIDE, oxidized, OXYGEN, secondary ion mass spectrometry, SURFACES, THIN-FILMS, XPS INVESTIGATIONS, ZIRCONIUM, ZR(0001)}, isbn = {0008-4042}, url = {://000079398800002}, author = {Shimizu, K. and Flinn, B. J. and Wong, P. C. and Mitchell, K. A. R.} } @article {4329, title = {A surface spectroscopic study of calcinated molybdenum-aluminum oxide model catalysts}, journal = {Applied Surface Science}, volume = {125}, number = {3-4}, year = {1998}, note = {ISI Document Delivery No.: ZH199Times Cited: 7Cited Reference Count: 24}, month = {Mar}, pages = {293-299}, type = {Article}, abstract = {Supported molybdena model catalysts, prepared by wet deposition of ammonium molybdate on oxide-coated planar samples of aluminum, were studied especially as a function of calcination temperature (200, 350 and 450 degrees C). Characterizations by X-ray photoelectron spectroscopy (XPS), secondary ion mass spectrometry (SIMS) and secondary electron microscopy (SEM) indicate that the Mo disperses uniformly on the support at 450 degrees C. Observations of the Al(KLL) Auger peak, excited by bremsstrahlung radiation, and the corresponding Auger parameter, were taken to indicate the formation of a new surface bonding arrangement after calcination at this temperature. It is hypothesized that direct Mo-O-Al surface linkages are formed at 450 degrees C, and that this provides the driving force for the enhanced Mo dispersion observed. (C) 1998 Elsevier Science B.V.}, keywords = {CO-MO-GAMMA-AL2O3, OXIDATION, RAMAN, THIN-FILMS, XPS}, isbn = {0169-4332}, url = {://000073082800005}, author = {Leung, Y. L. and Flinn, B. J. and Wong, P. C. and Mitchell, K. A. R. and Smith, K. J.} } @article {3745, title = {Bacterial transformation of pyrene in a marine environment}, journal = {Environmental Science \& Technology}, volume = {30}, number = {4}, year = {1996}, note = {ISI Document Delivery No.: UC413Times Cited: 11Cited Reference Count: 33}, month = {Apr}, pages = {1115-1119}, type = {Article}, abstract = {The bacterial transformation of pyrene in an estuary environment, Kitimat Arm, British Columbia, Canada, was studied. A metabolite was separated from marine sediment and pore water samples and was id entified as cis-4,5-dihydroxy-4,5-dihydropyrene, based on a comparison of the metabolite with the authentic standard, by using both high-performance liquid chromatography and capillary gas chromatography with mass spectrometry detection. The presence of this key metabolite of dioxygenase-mediated transformation of pyrene, along with previous pyrene degradation studies using cultures isolated from the same sediment samples, suggests a possible in situ bacterial transformation of pyrene in the Kitimat Arm environment.}, keywords = {ALASKA, BIODEGRADATION, DEGRADATION, MINERALIZATION, NAPHTHALENE, OIL-SPILL BIOREMEDIATION, OXIDATION, POLYCYCLIC AROMATIC-HYDROCARBONS}, isbn = {0013-936X}, url = {://A1996UC41300029}, author = {Li, X. F. and Le, X. C. and Simpson, C. D. and Cullen, W. R. and Reimer, K. J.} } @article {3598, title = {Catalysed aerobic dehydrogenation of amines and an X-ray crystal structure of a bis(benzylamine) ruthenium(II) porphyrin species}, journal = {Chemical Communications}, number = {20}, year = {1996}, note = {ISI Document Delivery No.: VP467Times Cited: 46Cited Reference Count: 13}, month = {Oct}, pages = {2343-2344}, type = {Article}, abstract = {The complex trans-[Ru-VI(tmp)(O)(2)] 1 (tmp = dianion of 5,10,15,20-tetramesitylporphyrin) catalytically dehydrogenates primary and secondary amines in the presence of air; possible reaction steps involve a disproportionation reaction that generates a Ru-II intermediate, as evidenced by the isolated bis(benzylamine) complex [Ru-II(tmp)-(PhCH(2)NH(2))(2)] 2 which is characterised crystallographically.}, keywords = {COMPLEXES, OXIDATION}, isbn = {1359-7345}, url = {://A1996VP46700019}, author = {Bailey, A. J. and James, Brian R.} } @article {3633, title = {Improved protocols for the synthesis and halogenation of sterically hindered metalloporphyrins}, journal = {Synthesis-Stuttgart}, number = {11}, year = {1996}, note = {ISI Document Delivery No.: VV383Times Cited: 31Cited Reference Count: 38}, month = {Nov}, pages = {1320-\&}, type = {Article}, abstract = {Improved procedures are described for the synthesis of meso-tetrakis(2,6-dichlorophenyl)porphyrin and for subsequent perhalogenation of the porphyrin ring.}, keywords = {ACCESS, CATALYSTS, CATALYTIC OXYGENATION, EASY, EFFICIENT CATALYSTS, EPOXIDATION, halogenated porphyrins, HYDROXYLATION, metalloporphyrins halogenation, OXIDATION, OXIDATION REACTIONS, porphyrins, TETRAARYLPORPHYRINS, TETRAMESITYLPORPHYRIN, TETRAPHENYLPORPHYRINS}, isbn = {0039-7881}, url = {://A1996VV38300016}, author = {Chorghade, M. S. and Dolphin, D. and Dupre, D. and Hill, D. R. and Lee, E. C. and Wijesekera, T. P.} } @article {3744, title = {Microbial degradation of pyrene and characterization of a metabolite}, journal = {Science of the Total Environment}, volume = {177}, year = {1996}, note = {ISI Document Delivery No.: TP870Times Cited: 10Cited Reference Count: 37}, month = {Jan}, pages = {17-29}, type = {Article}, abstract = {We report the degradation of pyrene by microorganisms present in sea water and sediment samples that were obtained from Kitimat Arm, BC, Canada, an environment that is highly contaminated by polycyclic aromatic hydrocarbons because of nearby aluminum smelting activity. The utilization of pyrene as sole carbon source by the microorganisms is demonstrated by monitoring the disappearance of pyrene and the production of its metabolite in the cultures. Pyrene (10 mu g) is degraded to an undetectable level after 120 h of incubation with 0.5 mi of the enriched culture and 10 ml of mineral salt medium. The extent of mineralization is also assessed by determining the radioactivity of the (CO2)-C-14 produced from the cultures containing C-14-labeled pyrene: up to 65\% of the pyrene is mineralized after 12 days of incubation. A metabolite that accumulates in the pyrene degradation cultures can be isolated. This metabolite is identified as cis-dihydrodiol pyrene, an initial ring oxidation product, on the basis of its chromatographic behavior, absorption spectrum, fluorescence excitation and emission spectra, and mass spectra.}, keywords = {BACTERIAL, BIODEGRADATION, bioremediation, cis-dihydrodiol pyrene, CONTAMINATED SOIL, HYDROCARBONS, METABOLITE, microbial degradation, MINERALIZATION, MYCOBACTERIUM SP, NAPHTHALENE, OXIDATION, PHENANTHRENE, polycyclic aromatic, POLYCYCLIC AROMATIC-HYDROCARBONS, PYRENE, SEDIMENT}, isbn = {0048-9697}, url = {://A1996TP87000003}, author = {Li, X. F. and Cullen, W. R. and Reimer, K. J. and Le, X. C.} } @article {3850, title = {Porphyrins bearing halogens at the meso-phenyl and beta-pyrrolic positions: Synthesis and spectral properties}, journal = {Bulletin De La Societe Chimique De France}, volume = {133}, number = {7-8}, year = {1996}, note = {ISI Document Delivery No.: VN339Times Cited: 27Cited Reference Count: 58}, pages = {765-775}, type = {Article}, abstract = {The synthesis of symmetrical porphyrins chlorinated at both ortho positions of the meso-aryl substituents, and the chlorination and bromination of the beta-pyrrole positions is reported. The beta-chlorination of meso-tetraphenylporphyrin via its nickel(II) complex is also described. In addition, we communicate the first perchlorination of tetramesitylporphyrin, where halogen substitution occurred at the beta-pyrrolic positions as well as at both the vacant meta positions of the trimethylphenyl groups. The iron complexes of these various polyhalogenated porphyrins are also described, since they are robust and efficient catalysts in oxidation reactions.}, keywords = {6-dichlorophenyl) porphyrin, bromination, CATALYST, CHLORINATION, COMPLEXES, EASY ACCESS, EFFICIENT CATALYSTS, EPOXIDATION, home, iron porphyrin, IRON(III) PORPHYRINS, METALLOPORPHYRIN, METALLOPORPHYRINS, OXIDATION, SELECTIVE AIR-OXIDATION, TETRAARYLPORPHYRINS, tetrakis(2, TETRAMESITYLPORPHYRIN, TETRAPHENYLPORPHYRINS}, isbn = {0037-8968}, url = {://A1996VN33900018}, author = {Wijesekera, T. and Dupre, D. and Cader, M. S. R. and Dolphin, D.} } @article {3390, title = {High-resolution Fourier transform infrared study of the out-of-plane bending fundamentals of HCOCl and DCOCl}, journal = {Journal of Molecular Spectroscopy}, volume = {174}, number = {2}, year = {1995}, note = {ISI Document Delivery No.: TN850Times Cited: 4Cited Reference Count: 32}, month = {Dec}, pages = {353-364}, type = {Article}, abstract = {High-resolution infrared spectra of the out-of-plane bending (upsilon(6)) fundamentals of the transient molecules HCOCl and DCOCl are reported. The HCOCl band consists of a C-type component due to the out-of-plane transition moment from the ground state and a Coriolis-induced parallel component which derives its intensity from mixing of the 4(1) and 6(1) vibrational states. In DCOCl, the C-type component is absent, so that all of the band intensity comes from Coriolis-induced borrowing from upsilon(4). The DCOCl upsilon(4) and upsilon(6) bands have been fitted simultaneously to account for the strong first-order and weaker second-order a-axis Coriolis interactions between the fundamentals. In HCOCl the upsilon(6) band is only weakly perturbed by upsilon(4) but is more strongly affected by local interactions with the 5(2) vibrational level, which have been explicitly included in the analysis. Ab initio predictions of the relative intensities of the upsilon(6) fundamentals show that the change in dipole moment is much smaller for DCOCl, accounting for the absence of the C-type component. (C) 1995 Academic Press, Inc.}, keywords = {CH3CL, CL ATOM, FORMYL CHLORIDE, FTIR, GAS-PHASE REACTIONS, KINETICS, MECHANISMS, MICROWAVE-SPECTRUM, OXIDATION}, isbn = {0022-2852}, url = {://A1995TN85000007}, author = {Joo, D. L. and Clouthier, D. J. and Merer, A. J.} } @article {3391, title = {A HIGH-RESOLUTION FOURIER-TRANSFORM INFRARED STUDY OF THE NU(3)-BAND, NU(4)-BAND, AND NU(5)-BAND OF DEUTERATED FORMYL CHLORIDE (DCOCL)}, journal = {Journal of Molecular Spectroscopy}, volume = {170}, number = {2}, year = {1995}, note = {ISI Document Delivery No.: QT231Times Cited: 8Cited Reference Count: 21}, month = {Apr}, pages = {346-355}, type = {Article}, abstract = {High-resolution infrared spectra of the low-lying nu(3), nu(4), and nu(5) fundamentals of the transient molecule DCOCl are reported. These type-A/B hybrid bands have been analyzed in detail, providing extensive rotational assignments for the (DCOCl)-Cl-35 and (DCOCl)-Cl-37 isotopomers. The ground state constants have been refined by a simultaneous fit of the available microwave data and FTIR combination differences from the three bands. The excited state constants have been determined by fitting assignments over a wide range of J and K-a values. A small perturbation was found at high K-a values in the nu(4) band and determined to be due to a Delta K-d = -2 interaction with the rotational levels of the 6(1) vibrational state. (C) 1995 Academic Press, Inc.}, keywords = {CL ATOM, FTIR, GAS-PHASE REACTIONS, KINETICS, MICROWAVE-SPECTRUM, OXIDATION}, isbn = {0022-2852}, url = {://A1995QT23100005}, author = {Joo, D. L. and Laboy, J. and Kolomeisky, A. and Zhuo, Q. and Clouthier, D. J. and Chan, C. P. and Merer, A. J. and Judge, R. H.} } @article {3547, title = {A LEED CRYSTALLOGRAPHIC ANALYSIS FOR THE HALF MONOLAYER STRUCTURE FORMED BY O AT THE ZR(0001) SURFACE}, journal = {Surface Science}, volume = {342}, number = {1-3}, year = {1995}, note = {ISI Document Delivery No.: TH886Times Cited: 32Cited Reference Count: 35}, month = {Nov}, pages = {272-280}, type = {Article}, abstract = {A tensor LEED analysis has been made for the half monolayer structure formed by O absorbed at the Zr(0001) surface. The analysis uses intensity-versus-energy curves for eight independent diffracted beams measured at normal incidence. The best correspondence with the experimental intensity data is for a model in which O atoms occupy octahedral holes in an unreconstructed metallic structure, with 0.25 ML between the first and second metal layers, and another 0.25 ML between the second and third metal layers. These two (2 X 2)-O arrays are displaced laterally from one another by an unit translational vector of the Zr(0001) substrate. The O atoms induce both vertical and lateral relaxations in the three topmost Zr layers; the largest displacements being found in the second Zr layer. The averaged O-Zr bond length is 2.28 Angstrom, about 0.02 Angstrom shorter than the value in bulk ZrO.}, keywords = {0001 SURFACE, 2)-O, ALPHA-AL2O3, chemisorption, ENERGY-ELECTRON-DIFFRACTION, INDUCED RECONSTRUCTION, LOW ENERGY ELECTRON DIFFRACTION (LEED), LOW INDEX SINGLE CRYSTAL, OXIDATION, OXYGEN, SURFACE RELAXATION, SURFACES, X, ZIRCONIUM}, isbn = {0039-6028}, url = {://A1995TH88600034}, author = {Wang, Y. M. and Li, Y. S. and Mitchell, K. A. R.} } @article {3472, title = {SYNTHESIS AND CHARACTERIZATION OF (OCTAETHYLPORPHYRINATO)RUTHENIUM(II) AND (OCTAETHYLPORPHYRINATO)RUTHENIUM(III) COMPLEXES WITH THIOETHER, SULFOXIDE, AND BENZOATE AXIAL LIGANDS}, journal = {Inorganic Chemistry}, volume = {34}, number = {13}, year = {1995}, note = {ISI Document Delivery No.: RF414Times Cited: 16Cited Reference Count: 58}, month = {Jun}, pages = {3477-3484}, type = {Article}, abstract = {{Complexes in the series Ru(OEP)(RR{\textquoteright}S)(2) and Ru(OEP)(RR{\textquoteright}SO)(2) (where OEP = the dianion of 2,3,7,8,12,13,17,18-octaethylporphyrin}, keywords = {AEROBIC EPOXIDATION, CHEMISTRY, CRYSTAL, ELECTRON-TRANSFER, EXTRAPLANAR LIGANDS, OXIDATION, REACTIVITY, redox properties, RUTHENIUM PORPHYRIN DIMERS, SYSTEM}, isbn = {0020-1669}, url = {://A1995RF41400016}, author = {Pacheco, A. and James, Brian R. and Rettig, S. J.} } @article {3068, title = {DETERMINATION OF THE SPECTROSCOPIC CONSTANTS OF A DARK VIBRATIONAL-STATE - FERMI AND CORIOLIS PERTURBATIONS IN THE NU-2 BAND OF FORMYL CHLORIDE}, journal = {Journal of Chemical Physics}, volume = {101}, number = {1}, year = {1994}, note = {ISI Document Delivery No.: NT521Times Cited: 20Cited Reference Count: 25}, month = {Jul}, pages = {31-38}, type = {Article}, abstract = {The nu(2) infrared fundamental of the transient molecule formyl chloride, HCOCl, has been recorded at high resolution. Detailed assignments of the rotational structure have been made for both HCO Cl-35 and (HCOCl)-Cl-37. The nu(2) band, whose origin is at 1784.1377 cm(-1) in (HCOCl)-Cl-35, is predominantly A type with a very weak B-type component. Numerous excited state perturbations occur throughout the band, caused mainly by Δ K-a\=2 Fermi resonance and Δ K-a\=1 Coriolis interactions with the 3(1)5(1) vibrational state. Even though no {\textquoteright}{\textquoteright}extra{\textquoteright}{\textquoteright} lines resulting from the perturbations could be assigned, a complete analysis of the perturbed rotational structure has been possible. Accurate molecular constants for both the {\textquoteright}{\textquoteright}bright{\textquoteright}{\textquoteright} perturbed 2(1) state and the {\textquoteright}{\textquoteright}dark{\textquoteright}{\textquoteright} 3(1)5(1) perturbing state have been obtained, using a Hamiltonian which includes both the Fermi and Coriolis interactions; only two interaction parameters are needed, one for each mechanism. Further perturbations at high K-a are assigned to Coriolis interactions with the 5(2)6(1) level.}, keywords = {ACID, CL ATOM, FORMALDEHYDE, FTIR, INFRARED-SPECTRUM, MICROWAVE-SPECTRUM, OH, OXIDATION}, isbn = {0021-9606}, url = {://A1994NT52100005}, author = {Joo, D. L. and Clouthier, D. J. and Merer, A. J.} } @article {2968, title = {ORGANOMETALLIC OXIDES - PREPARATION AND PROPERTIES OF THE CLUSTERS (ETA-C(5)ME(5))(4)MO5O11 AND ([(ETA-C(5)ME(5))MO](3)(MU-OH)(N)(MU-O)(6-N))CL-2}, journal = {Journal of the American Chemical Society}, volume = {116}, number = {18}, year = {1994}, note = {ISI Document Delivery No.: PF913Times Cited: 22Cited Reference Count: 39}, month = {Sep}, pages = {7989-7995}, type = {Article}, abstract = {{Reaction of [(eta-C(5)Me(5))Mo(O)(mu-O)](2) with [(eta-C(5)Me(5))Mo(CO)(2)]2 plus O-2 give (eta-C(5)Me(5))(4)Mo5O11. This cluster contains (eta-C(5)Me(5))Mo(O)(2) attached to a [(eta-C(5)Me(5))Mo(mu-O)](3)(mu(3)-O)(3)Mo(O)(2) unit-by a bridging oxygen atom. The [Mo(mu-O)](3)(mu(3)-O)(3)Mo structure is favored over the alternative adamantane-like [M(4)(mu-O)(6)] structure because of the pi-bonding of the terminal oxygen atoms attached to the apical Mb atom. The [(eta-C(5)Me(5))Mo(mu-O)](3)(mu(3)-O)(3)Mo(O)(2) unit contains four cluster electrons which are associated with the three basal molybdenum atoms. The magnetic moment of (eta-C(5)Me(5))(4)Mo4O11 was 3.16 mu(B) at 291 K, indicating that the cluster core has two unpaired electrons. Crystal data: C40H60Mo5O11, triclinic, P (1) over bar}, keywords = {<(ETA-5-C5ME5)3RE3(MU-O)6>2+, <(ETA-C5H5)CR(MU-3-O)>4, COMPLEXES, CRYSTAL-STRUCTURE, ELECTRONIC-STRUCTURES, MAIN GROUP ELEMENTS, multiple bonds, OXIDATION, TRANSITION-METALS}, isbn = {0002-7863}, url = {://A1994PF91300005}, author = {Bottomley, F. and Chen, J. H. and Preston, K. F. and Thompson, R. C.} } @article {3030, title = {ROTATIONAL ANALYSIS OF THE HIGH-RESOLUTION INFRARED-SPECTRA OF THE NU-4 AND NU-5 BANDS OF FORMYL CHLORIDE}, journal = {Journal of Molecular Spectroscopy}, volume = {168}, number = {1}, year = {1994}, note = {ISI Document Delivery No.: PM716Times Cited: 7Cited Reference Count: 17}, month = {Nov}, pages = {99-108}, type = {Article}, abstract = {The high-resolution infrared spectra of the low-lying nu4 and nu5 fundamentals of the transient molecule formyl chloride, HCOCl, are reported. Both thype A/B hybrid bands have been analyzed in detail, providing rotational assignments for the HCO Cl-35 and HCO Cl-37 isotopomers. The excited state rotational and centrifugal distortion constants have been determined by fitting assignments over a wide range of J and K(a) values. No perturbations were detected in either band. (C) 1991 Academic Pess, Inc.}, keywords = {CL ATOM, FTIR, OXIDATION}, isbn = {0022-2852}, url = {://A1994PM71600007}, author = {French, J. L. and Clouthier, D. J. and Chan, C. P. and Ma, E. S. F. and Lai, V. W. M. and Merer, A. J. and Judge, R. H.} } @article {2951, title = {SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF (NEOPENTYL)(OCTAETHYLPORPHYRINATO)RUTHENIUM COMPLEXES, INCLUDING [RU(OEP)NP]2(MU-LI)2}, journal = {Organometallics}, volume = {13}, number = {7}, year = {1994}, note = {ISI Document Delivery No.: NW037Times Cited: 21Cited Reference Count: 26}, month = {Jul}, pages = {2542-2544}, type = {Note}, abstract = {Reaction of neopentyllithium (LiNp) with the octaethylporphyrin complex Ru(OEP)Cl2 yields Ru-(OEP)Np (1), which can be treated with further LiNp to give [Ru(OEP)Np]2(mu-Li)2 (2). The structures of 1 (the first for an iron-group metalloporphyrin alkyl) and the more remarkable 2, revealing two Li atoms sandwiched between metalloporphyrin moieties, are determined.}, keywords = {CHEMISTRY, CRYSTAL-STRUCTURE, DIMERS, lithium, OXIDATION, REACTIVITY, REDOX, TETRAVALENT RUTHENIUM PORPHYRIN}, isbn = {0276-7333}, url = {://A1994NW03700002}, author = {Alexander, C. S. and Rettig, S. J. and James, Brian R.} } @article {2839, title = {AN ANALYSIS OF THE HIGH-RESOLUTION INFRARED-SPECTRUM OF THE NU-3 BAND OF FORMYL CHLORIDE}, journal = {Journal of Molecular Spectroscopy}, volume = {161}, number = {1}, year = {1993}, note = {ISI Document Delivery No.: LT178Times Cited: 14Cited Reference Count: 16}, month = {Sep}, pages = {123-135}, type = {Article}, keywords = {CL ATOM, FTIR, MICROWAVE-SPECTRUM, OXIDATION}, isbn = {0022-2852}, url = {://A1993LT17800011}, author = {Joo, D. L. and Clouthier, D. J. and Lau, B. and Merer, A. J.} } @article {2837, title = {ROUTES TO RUTHENIUM(II) BROMO(SULFOXIDE) COMPLEXES, INCLUDING THE SYNTHESIS AND STRUCTURAL CHARACTERIZATION OF A NEUTRAL DILITHIUM DIRUTHENIUM(II) COMPLEX CONTAINING TERMINAL AND BRIDGING TETRAMETHYLENE SULFOXIDE LIGANDS}, journal = {Inorganica Chimica Acta}, volume = {207}, number = {1}, year = {1993}, note = {ISI Document Delivery No.: LB776Times Cited: 7Cited Reference Count: 36}, month = {May}, pages = {97-103}, type = {Article}, abstract = {{The dimeric Ru(II) complex [Br6(TMSO)2Ru2(mu2-TMSO)2(mu3-TMSO)2Li2(TMSO)2] (1) has been isolated from solutions containing RuCl3.3H3O, LiBr and TMSO (TMSO = tetramethylene sulfoxide, O and S indicating oxygen- and sulfur-bonding, respectively). Crystals of 1 are monoclinic}, keywords = {CHELATION, CRYSTAL-STRUCTURE, DIMETHYLSULFOXIDE, OXIDATION, SOLUTION CHEMISTRY, SULFOXIDE)RUTHENIUM(II), SULFOXIDE)TETRACHLORORUTHENATE(III), VERSATILE STARTING MATERIALS}, isbn = {0020-1693}, url = {://A1993LB77600014}, author = {Jaswal, J. S. and Yapp, D. T. T. and Rettig, S. J. and James, Brian R. and Skov, K. A.} } @article {2928, title = {XPS STUDIES OF THE STABILITY AND REACTIVITY OF THIN-FILMS OF OXIDIZED ZIRCONIUM}, journal = {Applied Surface Science}, volume = {72}, number = {3}, year = {1993}, note = {ISI Document Delivery No.: MF104Times Cited: 21Cited Reference Count: 32}, month = {Nov}, pages = {237-244}, type = {Article}, abstract = {X-ray photoelectron spectroscopy (XPS) has been used to characterize thin films formed by the deposition of zirconium on to gold foil. With deposition rates of the order of 1 angstrom min-1, in the presence of an atmosphere of 10(-9) mbar H2O, the film has an outer region Of ZrO2 and inner regions of a lower oxidation state material, ZrO(x), and Zr-Au alloy. Initially both ZrO(x) and Zr-Au alloy are oxidized by either H2O or O2 at 300-degrees-C, although this process is hindered as the ZrO2 layer gets thicker. However, even with the protective oxide layer, heating in 5 x 10(-7) mbar D2 (with a partial pressure of 10(-9) mbar H2O) can convert ZrO(x) to ZrO2, a reaction apparently facilitated by migrating D atoms.}, keywords = {ADSORPTION, AES, BINDING-ENERGY SHIFTS, electron, HYDROGEN, OXIDATION, OXYGEN, RAY PHOTOELECTRON-SPECTROSCOPY, SINGLE-CRYSTAL, SURFACES, ZR}, isbn = {0169-4332}, url = {://A1993MF10400004}, author = {Wang, Y. M. and Li, Y. S. and Wong, P. C. and Mitchell, K. A. R.} } @article {7302, title = {ORGANOMETALLIC OXO CHEMISTRY .4. REACTIVITY OF CP-ASTERISK-W(O)2(CH2SIME3) TOWARD PARA-TOLYL ISOCYANATE - CYCLOADDITION REACTIONS OF TUNGSTEN-OXO AND TUNGSTEN-IMIDO LINKAGES}, journal = {Organometallics}, volume = {11}, number = {9}, year = {1992}, note = {ISI Document Delivery No.: JN066Times Cited: 50Cited Reference Count: 40}, month = {Sep}, pages = {3104-3110}, type = {Article}, abstract = {{Treatment of CP*W(O)2(CH2SiMe3) with p-tolyl isocyanate under appropriate experimental conditions leads to the formation of Cp*W(O)(NC6H4-p-Me)(CH2SiMe3) (1), Cp*W(NC6H4-p-Me)2(CH2SiMe3) (2), or Cp*W(NC6H4-P-Me)[N(C6H4-P-Me)C(O)N(C6H4-P-Me)](CH2SiMe3) (3). Each of the complexes 1-3 is derived in a sequential manner from its precursor by incorporation of an additional p-tolyl isocyanate fragment or molecule. The spectroscopic properties of these organometallic imido complexes are consistent with their possessing three-legged (1 and 2) and four-legged (3) piano-stool molecular structures. These conclusions have been confirmed by single-crystal X-ray crystallographic analyses of 2 and 3. Crystal data for 2: triclinic}, keywords = {ACTIVATION, AMIDO, AMMOXIDATION, COMPLEXES, LIGANDS, METAL, MOLYBDENUM, OXIDATION, propylene, SULFIDO}, isbn = {0276-7333}, url = {://A1992JN06600027}, author = {Legzdins,Peter and Phillips, E. C. and Rettig, S. J. and Trotter, J. and Veltheer, J. E. and Yee, V. C.} } @article {7302, title = {ORGANOMETALLIC OXO CHEMISTRY .4. REACTIVITY OF CP-ASTERISK-W(O)2(CH2SIME3) TOWARD PARA-TOLYL ISOCYANATE - CYCLOADDITION REACTIONS OF TUNGSTEN-OXO AND TUNGSTEN-IMIDO LINKAGES}, journal = {Organometallics}, volume = {11}, number = {9}, year = {1992}, note = {ISI Document Delivery No.: JN066Times Cited: 50Cited Reference Count: 40}, month = {Sep}, pages = {3104-3110}, type = {Article}, abstract = {{Treatment of CP*W(O)2(CH2SiMe3) with p-tolyl isocyanate under appropriate experimental conditions leads to the formation of Cp*W(O)(NC6H4-p-Me)(CH2SiMe3) (1), Cp*W(NC6H4-p-Me)2(CH2SiMe3) (2), or Cp*W(NC6H4-P-Me)[N(C6H4-P-Me)C(O)N(C6H4-P-Me)](CH2SiMe3) (3). Each of the complexes 1-3 is derived in a sequential manner from its precursor by incorporation of an additional p-tolyl isocyanate fragment or molecule. The spectroscopic properties of these organometallic imido complexes are consistent with their possessing three-legged (1 and 2) and four-legged (3) piano-stool molecular structures. These conclusions have been confirmed by single-crystal X-ray crystallographic analyses of 2 and 3. Crystal data for 2: triclinic}, keywords = {ACTIVATION, AMIDO, AMMOXIDATION, COMPLEXES, LIGANDS, METAL, MOLYBDENUM, OXIDATION, propylene, SULFIDO}, isbn = {0276-7333}, url = {://A1992JN06600027}, author = {Legzdins,Peter and Phillips, E. C. and Rettig, S. J. and Trotter, J. and Veltheer, J. E. and Yee, V. C.} } @article {6996, title = {VERATRYL ALCOHOL AS A MEDIATOR IN LIGNIN MODEL-COMPOUND BIODEGRADATION}, journal = {Holzforschung}, volume = {45}, number = {1}, year = {1991}, note = {ISI Document Delivery No.: FC210Times Cited: 7Cited Reference Count: 22}, month = {Feb}, pages = {31-35}, type = {Article}, abstract = {Veratryl alcohol and 1,4-dimethoxybenzene were found to be ineffective mediators for the oxidation of anisyl alcohol by the lignin peroxidase model, iron meso-tetra(2,6-dichloro-3-sulfonatophenyl)porphyrin chloride (TDCSPPFeCl). However, veratryl alcohol can mediate the electrochemical oxidation of the polymeric dye Poly B-411. The TDCSPPFeCl catalyzed reactions of lignin model compounds were found to be dependent on pH and the solvent being used. The importance of the mediating role of veratryl alcohol in lignin degradation is discussed.}, keywords = {APPROACH, BASIDIOMYCETE PHANEROCHAETE-CHRYSOSPORIUM, BIOMIMETIC, BURDS, C BOND-CLEAVAGE, DEGRADATION, ENZYME, IRON PORPHYRINS, LIGNIN, MECHANISM, MEDIATOR, OXIDATION, PEROXIDASE, PORPHYRIN, SYSTEM, VERATRYL ALCOHOL}, isbn = {0018-3830}, url = {://A1991FC21000006}, author = {Cui, F. T. and Dolphin, D.} }