@article {581, title = {3,3 {\textquoteright}-Dipyrrolyl sulfides, useful building blocks for the syntheses of macrocycles containing dipyrromethene units}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {81}, number = {9}, year = {2003}, note = {ISI Document Delivery No.: 721MBTimes Cited: 1Cited Reference Count: 18}, month = {Sep}, pages = {988-991}, type = {Article}, abstract = {5,5{\textquoteright}-Dicarboxy-3,3{\textquoteright}-dipyrrolyl sulfide was condensed with 5,5{\textquoteright}-diformyl-3,3{\textquoteright}-dipyrrolyl sulfide or 5,5{\textquoteright}-diformyldipyrromethane under acidic conditions to produce, in high yields, macrocycles containing four dipyrromethene units.}, keywords = {3, 3-dipyrrolyl sulfide, cyclopolypyrrole, dipyrromethene, EXPANDED PORPHYRINS, EXTRUSION, macrocycle}, isbn = {0008-4042}, url = {://000185319200004}, author = {Chen, Q. Q. and Dolphin, D.} } @article {529, title = {Definitive evidence for monoanionic binding of 2,3-dihydroxybiphenyl to 2,3-dihydroxybiphenyl 1,2-dioxygenase from UV resonance Raman spectroscopy, UV/Vis absorption spectroscopy, and crystallography}, journal = {Journal of the American Chemical Society}, volume = {124}, number = {11}, year = {2002}, note = {ISI Document Delivery No.: 531UMTimes Cited: 53Cited Reference Count: 79}, month = {Mar}, pages = {2485-2496}, type = {Article}, abstract = {Ultraviolet resonance Raman spectroscopy (UVRRS), electronic absorption spectroscopy, and X-ray crystallography were used to probe the nature of the binding of 2,3-dihydroxybiphenyl (DHB) to the extradiol ring-cleavage enzyme, 2,3-dihydroxybiphenyl 1,2-dioxygenase (DHBD; EC 1.13.11.39). The lowest lying transitions in the electronic absorption spectrum of DHBD-bound DHB occurred at 299 nm, compared to 305 nm for the monoanionic DHB species in buffer. In contrast, the corresponding transitions in neutral and dianionic DHB occurred at 283 and 348 nm, respectively, indicating that DHBD-bound DHB is monoanionic. These binding-induced spectral changes, and the use of custom-designed optical fiber probes, facilitated UVRR experiments. The strongest feature of the UVRR spectrum of DHB was a Y8a-like mode around 1600 cm(-1), whose position depended strongly on the protonation state of the DHB. In the spectrum of the DHBD-bound species, this feature occurred at 1603 cm-1, as observed in the spectrum of monoanionic DHB. Raman band shifts were observed in deuterated solvent, ruling out dianionic binding of the substrate. Thus, the electronic absorption and UVRRS data demonstrate that DHBD binds its catecholic substrate as a monoanion, definitively establishing this feature of the proposed mechanism of extradiol dioxygenases. This conclusion is supported by a crystal structure of the DHBD:DHB complex at 2.0 Angstrom resolution, which suggests that the substrate{\textquoteright}s 2-hydroxyl substituent, and not the 3-hydroxyl group, deprotonates upon binding. The structural data also show that the aromatic rings of the enzyme-bound DHB are essentially orthogonal to each other. Thus, the 6 nm blue shift of the transition for bound DHB relative to the monoanion in solution could indicate a conformational change upon binding. Catalytic roles of active site residues are proposed based on the structural data and previously proposed mechanistic schemes.}, keywords = {3, 4-DIOXYGENASE, BIPHENYL, CRYSTAL-STRUCTURE, EXTRADIOL CATECHOL DIOXYGENASES, FE(II) ACTIVE-SITE, FE3+ LIGAND, LIGAND-BINDING, MECHANISM, MOLECULAR-STRUCTURE, PROTOCATECHUATE, SUBSTRATE-BINDING}, isbn = {0002-7863}, url = {://000174435700037}, author = {Vaillancourt, F. H. and Barbosa, C. J. and Spiro, T. G. and Bolin, J. T. and Blades, M. W. and Turner, R. F. B. and Eltis, L. D.} } @article {529, title = {Definitive evidence for monoanionic binding of 2,3-dihydroxybiphenyl to 2,3-dihydroxybiphenyl 1,2-dioxygenase from UV resonance Raman spectroscopy, UV/Vis absorption spectroscopy, and crystallography}, journal = {Journal of the American Chemical Society}, volume = {124}, number = {11}, year = {2002}, note = {ISI Document Delivery No.: 531UMTimes Cited: 53Cited Reference Count: 79}, month = {Mar}, pages = {2485-2496}, type = {Article}, abstract = {Ultraviolet resonance Raman spectroscopy (UVRRS), electronic absorption spectroscopy, and X-ray crystallography were used to probe the nature of the binding of 2,3-dihydroxybiphenyl (DHB) to the extradiol ring-cleavage enzyme, 2,3-dihydroxybiphenyl 1,2-dioxygenase (DHBD; EC 1.13.11.39). The lowest lying transitions in the electronic absorption spectrum of DHBD-bound DHB occurred at 299 nm, compared to 305 nm for the monoanionic DHB species in buffer. In contrast, the corresponding transitions in neutral and dianionic DHB occurred at 283 and 348 nm, respectively, indicating that DHBD-bound DHB is monoanionic. These binding-induced spectral changes, and the use of custom-designed optical fiber probes, facilitated UVRR experiments. The strongest feature of the UVRR spectrum of DHB was a Y8a-like mode around 1600 cm(-1), whose position depended strongly on the protonation state of the DHB. In the spectrum of the DHBD-bound species, this feature occurred at 1603 cm-1, as observed in the spectrum of monoanionic DHB. Raman band shifts were observed in deuterated solvent, ruling out dianionic binding of the substrate. Thus, the electronic absorption and UVRRS data demonstrate that DHBD binds its catecholic substrate as a monoanion, definitively establishing this feature of the proposed mechanism of extradiol dioxygenases. This conclusion is supported by a crystal structure of the DHBD:DHB complex at 2.0 Angstrom resolution, which suggests that the substrate{\textquoteright}s 2-hydroxyl substituent, and not the 3-hydroxyl group, deprotonates upon binding. The structural data also show that the aromatic rings of the enzyme-bound DHB are essentially orthogonal to each other. Thus, the 6 nm blue shift of the transition for bound DHB relative to the monoanion in solution could indicate a conformational change upon binding. Catalytic roles of active site residues are proposed based on the structural data and previously proposed mechanistic schemes.}, keywords = {3, 4-DIOXYGENASE, BIPHENYL, CRYSTAL-STRUCTURE, EXTRADIOL CATECHOL DIOXYGENASES, FE(II) ACTIVE-SITE, FE3+ LIGAND, LIGAND-BINDING, MECHANISM, MOLECULAR-STRUCTURE, PROTOCATECHUATE, SUBSTRATE-BINDING}, isbn = {0002-7863}, url = {://000174435700037}, author = {Vaillancourt, F. H. and Barbosa, C. J. and Spiro, T. G. and Bolin, J. T. and Blades, M. W. and Turner, R. F. B. and Eltis, L. D.} } @article {495, title = {Magnetic and structural studies on 1,3-diazolate complexes of cobalt(II) - The characterization of three new cobalt(II) molecule-based magnets}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {80}, number = {2}, year = {2002}, note = {ISI Document Delivery No.: 531ZZTimes Cited: 10Cited Reference Count: 35}, month = {Feb}, pages = {133-140}, type = {Article}, abstract = {{The cobalt(II) compounds ([Co(imid)(2)](x) (1), [Co(2-meimid)(2)](x) (2), [Co(4-meimid)(2)](x) (3), [Co(benzimid)(2)](x) (4), and [Co-3(imid)(6)(imidH)(2)](x) (5) (imid = imidazolate}, keywords = {1, 3, 3-diazolates, 5-DIMETHYLPYRAZOLATE, BR, canted spins, CH3, cobalt(II), COMPLEXES, COORDINATION CHEMISTRY, CRYSTAL-STRUCTURE, LIGANDS, LOW-TEMPERATURES, METAL PYRAZOLATE POLYMERS, METALLOCENES, molecule-based magnets, SYSTEMS}, isbn = {0008-4042}, url = {://000174448300002}, author = {Sanchez, V. and Storr, A. and Thompson, R. C.} } @article {495, title = {Magnetic and structural studies on 1,3-diazolate complexes of cobalt(II) - The characterization of three new cobalt(II) molecule-based magnets}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {80}, number = {2}, year = {2002}, note = {ISI Document Delivery No.: 531ZZTimes Cited: 10Cited Reference Count: 35}, month = {Feb}, pages = {133-140}, type = {Article}, abstract = {{The cobalt(II) compounds ([Co(imid)(2)](x) (1), [Co(2-meimid)(2)](x) (2), [Co(4-meimid)(2)](x) (3), [Co(benzimid)(2)](x) (4), and [Co-3(imid)(6)(imidH)(2)](x) (5) (imid = imidazolate}, keywords = {1, 3, 3-diazolates, 5-DIMETHYLPYRAZOLATE, BR, canted spins, CH3, cobalt(II), COMPLEXES, COORDINATION CHEMISTRY, CRYSTAL-STRUCTURE, LIGANDS, LOW-TEMPERATURES, METAL PYRAZOLATE POLYMERS, METALLOCENES, molecule-based magnets, SYSTEMS}, isbn = {0008-4042}, url = {://000174448300002}, author = {Sanchez, V. and Storr, A. and Thompson, R. C.} } @article {5034, title = {A highly efficient preparation of N-confused cyclodecapyrroles}, journal = {Tetrahedron Letters}, volume = {42}, number = {19}, year = {2001}, note = {ISI Document Delivery No.: 427KUTimes Cited: 4Cited Reference Count: 33}, month = {May}, pages = {3263-3265}, type = {Article}, abstract = {Cyclodecapyrroles, potential novel host systems, were synthesized in 78-88\% yields by condensation of tripyrrane dialdehyde with bis(5-carboxyl-2,4-dimethyl-pyrrole-3-yl)-methane, ethane, and -propane in the presence of HBr and TFA. (C) 2001 Elsevier Science Ltd. All rights reserved.}, keywords = {3, 3 {\textquoteright}-dipyrromethane, ANION SENSORS, CALIXPYRROLES, CYCLOOCTAPYRROLES, cyclopolypyrrole, EXPANDED PORPHYRINS, HOST, macrocycle, macrocycles, METAL-COMPLEXES, TRIPYRRANE}, isbn = {0040-4039}, url = {://000168404000006}, author = {Chen, Q. Q. and Dolphin, D.} } @article {4641, title = {Iron(II) 2-methylimidazolate and copper(II) 1,2,4-triazolate complexes: systems exhibiting long-range ferromagnetic ordering at low temperatures}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {77}, number = {4}, year = {1999}, note = {ISI Document Delivery No.: 204JXTimes Cited: 17Cited Reference Count: 27}, month = {Apr}, pages = {425-433}, type = {Article}, abstract = {{Crystals of [Fe(2-methylimidazolate)(2). 0.13(FeCp2)](x), 1, are orthorhombic}, keywords = {1, 2, 2-methylimidazolate, 3, 4-triazolate, 5-DIMETHYLPYRAZOLATE, BR, canted spins, CH3, COMPLEXES, copper, CRYSTAL, ferromagnets, iron, LIGANDS, MAGNETIC-PROPERTIES, METAL PYRAZOLATE POLYMERS, METALLOCENES}, isbn = {0008-4042}, url = {://000080762100003}, author = {Rettig, S. J. and Storr, A. and Summers, D. A. and Thompson, R. C. and Trotter, J.} } @article {4641, title = {Iron(II) 2-methylimidazolate and copper(II) 1,2,4-triazolate complexes: systems exhibiting long-range ferromagnetic ordering at low temperatures}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {77}, number = {4}, year = {1999}, note = {ISI Document Delivery No.: 204JXTimes Cited: 17Cited Reference Count: 27}, month = {Apr}, pages = {425-433}, type = {Article}, abstract = {{Crystals of [Fe(2-methylimidazolate)(2). 0.13(FeCp2)](x), 1, are orthorhombic}, keywords = {1, 2, 2-methylimidazolate, 3, 4-triazolate, 5-DIMETHYLPYRAZOLATE, BR, canted spins, CH3, COMPLEXES, copper, CRYSTAL, ferromagnets, iron, LIGANDS, MAGNETIC-PROPERTIES, METAL PYRAZOLATE POLYMERS, METALLOCENES}, isbn = {0008-4042}, url = {://000080762100003}, author = {Rettig, S. J. and Storr, A. and Summers, D. A. and Thompson, R. C. and Trotter, J.} } @article {4641, title = {Iron(II) 2-methylimidazolate and copper(II) 1,2,4-triazolate complexes: systems exhibiting long-range ferromagnetic ordering at low temperatures}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {77}, number = {4}, year = {1999}, note = {ISI Document Delivery No.: 204JXTimes Cited: 17Cited Reference Count: 27}, month = {Apr}, pages = {425-433}, type = {Article}, abstract = {{Crystals of [Fe(2-methylimidazolate)(2). 0.13(FeCp2)](x), 1, are orthorhombic}, keywords = {1, 2, 2-methylimidazolate, 3, 4-triazolate, 5-DIMETHYLPYRAZOLATE, BR, canted spins, CH3, COMPLEXES, copper, CRYSTAL, ferromagnets, iron, LIGANDS, MAGNETIC-PROPERTIES, METAL PYRAZOLATE POLYMERS, METALLOCENES}, isbn = {0008-4042}, url = {://000080762100003}, author = {Rettig, S. J. and Storr, A. and Summers, D. A. and Thompson, R. C. and Trotter, J.} } @article {4642, title = {The methylgallium-2-carboxylatobenzimidazolato hexamer, [MeGa center dot C8H4N2O2](6)center dot C6H6 center dot(Me2C6H4)(2); synthesis and X-ray crystal structure}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {77}, number = {4}, year = {1999}, note = {ISI Document Delivery No.: 204JXTimes Cited: 12Cited Reference Count: 18}, month = {Apr}, pages = {434-438}, type = {Article}, abstract = {{The room-temperature reaction of Me3Ga with benzimidazole 2-carboxylic acid in xylene solvent has yielded a novel crystalline hexameric gallium compound with "MeGa" moieties bridged by the doubly depronotated ligand precursor. Crystals of [MeGa(4,5-benzimidazolato-2-carboxylato)](6).(C6H6).(m-Me2C6H4)(2) are monoclinic}, keywords = {3, 5-DIMETHYLPYRAZOLATE, benzene intercalate, benzimidazolecarboxylic acid, COMPLEXES, crystal structure, gallium, METALLOCENES}, isbn = {0008-4042}, url = {://000080762100004}, author = {Rettig, S. J. and Storr, A. and Trotter, J.} } @article {4642, title = {The methylgallium-2-carboxylatobenzimidazolato hexamer, [MeGa center dot C8H4N2O2](6)center dot C6H6 center dot(Me2C6H4)(2); synthesis and X-ray crystal structure}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {77}, number = {4}, year = {1999}, note = {ISI Document Delivery No.: 204JXTimes Cited: 12Cited Reference Count: 18}, month = {Apr}, pages = {434-438}, type = {Article}, abstract = {{The room-temperature reaction of Me3Ga with benzimidazole 2-carboxylic acid in xylene solvent has yielded a novel crystalline hexameric gallium compound with "MeGa" moieties bridged by the doubly depronotated ligand precursor. Crystals of [MeGa(4,5-benzimidazolato-2-carboxylato)](6).(C6H6).(m-Me2C6H4)(2) are monoclinic}, keywords = {3, 5-DIMETHYLPYRAZOLATE, benzene intercalate, benzimidazolecarboxylic acid, COMPLEXES, crystal structure, gallium, METALLOCENES}, isbn = {0008-4042}, url = {://000080762100004}, author = {Rettig, S. J. and Storr, A. and Trotter, J.} } @article {4640, title = {Polybis(1-methyl-2-thioimidazolate)iron(II): Crystal structure and magnetic properties of a one-dimensional material exhibiting ferromagnetic ordering below 8 K}, journal = {Inorganic Chemistry}, volume = {38}, number = {25}, year = {1999}, note = {ISI Document Delivery No.: 265LFTimes Cited: 10Cited Reference Count: 28}, month = {Dec}, pages = {5920-+}, type = {Article}, abstract = {Polybis(1-methyl-2-thioimidazolate)iron(II): Crystal Structure and Magnetic Properties of a One-Dimensional Material Exhibiting Ferromagnetic Ordering below 8 K. The title compound has a rodlike 1-D structure in which iron ions are double bridged by 1-methyl-2-thioimidazolate ligands and the metal chromophores alternate along the chain between FeS4 and FeN4. Antiferromagnetic intrachain coupling with spin canting generates residual spin on the chains that undergo long-range ferromagnetic order below 8 K.}, keywords = {3, 5-DIMETHYLPYRAZOLATE COMPLEXES, BR, CH3, LIGANDS, METAL PYRAZOLATE POLYMERS, METALLOCENES}, isbn = {0020-1669}, url = {://000084245200045}, author = {Rettig, S. J. and Sanchez, V. and Storr, A. and Thompson, R. C. and Trotter, J.} } @article {4640, title = {Polybis(1-methyl-2-thioimidazolate)iron(II): Crystal structure and magnetic properties of a one-dimensional material exhibiting ferromagnetic ordering below 8 K}, journal = {Inorganic Chemistry}, volume = {38}, number = {25}, year = {1999}, note = {ISI Document Delivery No.: 265LFTimes Cited: 10Cited Reference Count: 28}, month = {Dec}, pages = {5920-+}, type = {Article}, abstract = {Polybis(1-methyl-2-thioimidazolate)iron(II): Crystal Structure and Magnetic Properties of a One-Dimensional Material Exhibiting Ferromagnetic Ordering below 8 K. The title compound has a rodlike 1-D structure in which iron ions are double bridged by 1-methyl-2-thioimidazolate ligands and the metal chromophores alternate along the chain between FeS4 and FeN4. Antiferromagnetic intrachain coupling with spin canting generates residual spin on the chains that undergo long-range ferromagnetic order below 8 K.}, keywords = {3, 5-DIMETHYLPYRAZOLATE COMPLEXES, BR, CH3, LIGANDS, METAL PYRAZOLATE POLYMERS, METALLOCENES}, isbn = {0020-1669}, url = {://000084245200045}, author = {Rettig, S. J. and Sanchez, V. and Storr, A. and Thompson, R. C. and Trotter, J.} } @article {4640, title = {Polybis(1-methyl-2-thioimidazolate)iron(II): Crystal structure and magnetic properties of a one-dimensional material exhibiting ferromagnetic ordering below 8 K}, journal = {Inorganic Chemistry}, volume = {38}, number = {25}, year = {1999}, note = {ISI Document Delivery No.: 265LFTimes Cited: 10Cited Reference Count: 28}, month = {Dec}, pages = {5920-+}, type = {Article}, abstract = {Polybis(1-methyl-2-thioimidazolate)iron(II): Crystal Structure and Magnetic Properties of a One-Dimensional Material Exhibiting Ferromagnetic Ordering below 8 K. The title compound has a rodlike 1-D structure in which iron ions are double bridged by 1-methyl-2-thioimidazolate ligands and the metal chromophores alternate along the chain between FeS4 and FeN4. Antiferromagnetic intrachain coupling with spin canting generates residual spin on the chains that undergo long-range ferromagnetic order below 8 K.}, keywords = {3, 5-DIMETHYLPYRAZOLATE COMPLEXES, BR, CH3, LIGANDS, METAL PYRAZOLATE POLYMERS, METALLOCENES}, isbn = {0020-1669}, url = {://000084245200045}, author = {Rettig, S. J. and Sanchez, V. and Storr, A. and Thompson, R. C. and Trotter, J.} } @article {4386, title = {Coordination complexes derived from 3,6-di(2-pyridyl)-1,4-dihydro-1,2,4,5-tetrazine (DPDHT). Synthesis and molecular structure of [(DPT)(GaMe2)2]}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {76}, number = {12}, year = {1998}, note = {ISI Document Delivery No.: 180RKTimes Cited: 3Cited Reference Count: 25}, month = {Dec}, pages = {1800-1804}, type = {Article}, abstract = {{The facile reaction of 3,6-di(2-pyridyl)-1,4-dihydro-1,2,4,5-tetrazine (DPDHT) (1) with trimethylgallium has resulted in the formation of the purple crystalline product, [(DPT)(GaMe2)(2)] (2), via methane elimination. Crystals of [(DPT)(GaMe2)(2)] are orthorhombic, Pbca}, keywords = {3, 5-DIMETHYLPYRAZOLATE, crystal structure, dipyridyldihydrotetrazine, MAGNETIC-PROPERTIES, METAL PYRAZOLATE POLYMERS, METALLOCENES, methylgallium}, isbn = {0008-4042}, url = {://000079398800003}, author = {Preston, P. N. and Rettig, S. J. and Storr, A. and Trotter, J.} } @article {4386, title = {Coordination complexes derived from 3,6-di(2-pyridyl)-1,4-dihydro-1,2,4,5-tetrazine (DPDHT). Synthesis and molecular structure of [(DPT)(GaMe2)2]}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {76}, number = {12}, year = {1998}, note = {ISI Document Delivery No.: 180RKTimes Cited: 3Cited Reference Count: 25}, month = {Dec}, pages = {1800-1804}, type = {Article}, abstract = {{The facile reaction of 3,6-di(2-pyridyl)-1,4-dihydro-1,2,4,5-tetrazine (DPDHT) (1) with trimethylgallium has resulted in the formation of the purple crystalline product, [(DPT)(GaMe2)(2)] (2), via methane elimination. Crystals of [(DPT)(GaMe2)(2)] are orthorhombic, Pbca}, keywords = {3, 5-DIMETHYLPYRAZOLATE, crystal structure, dipyridyldihydrotetrazine, MAGNETIC-PROPERTIES, METAL PYRAZOLATE POLYMERS, METALLOCENES, methylgallium}, isbn = {0008-4042}, url = {://000079398800003}, author = {Preston, P. N. and Rettig, S. J. and Storr, A. and Trotter, J.} } @article {4412, title = {Transition metal azolates from metallocenes. Part 3: Polymeric manganese(II) and nickel(II) pyrazolates; synthesis, characterization, and magnetochemistry}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {76}, number = {8}, year = {1998}, note = {ISI Document Delivery No.: 143VNTimes Cited: 13Cited Reference Count: 37}, month = {Aug}, pages = {1130-1137}, type = {Article}, abstract = {Direct reactions of nickelocene and manganocene with molten pyrazoles in an inert atmosphere or under vacuum have led to the isolation of the following metal pyrazolate compounds: [Ni(4-Xpz)(2)](x) (where X = EI, CI and pz = pyrazolate); [M(4-Xdmpz)(2)](x) (where X = H, CH3, Cl, Br and M = Ni, Mn and dmpz = 3,5-dimethylpyazolate); and [Mn(4-Xpz)(2)(4-XpzH)](x) (where X = Cl, Br and pzH = pyrazole). On the basis of indirect evidence all compounds are considered to have extended chain structures with metal ions linked in chains by double bridging pyrazolates. The two [Ni(4-Xpz)2], compounds are diamagnetic while all others are paramagnetic. Variable temperature magnetic susceptibility studies on the paramagnetic compounds reveal antiferromagnetic coupling between neighbouring metal ions. Analysis of the magnetic data (Hamiltonian of the form II = -2J Sigma S-i S-j) yields values of the exchange coupling constant J of -14 to -17 cm(-1) for the [Ni(4-Xdmpz)(2)](x) compounds, -1.2 to -2.1 cm(-1) for the [Mn(4-Xdmpz)(2)](x) compounds, and -0.41 cm(-1) for the [Mn(4-Xpz)(2)(4-XpzH)](x) compounds.}, keywords = {3, 5-DIMETHYLPYRAZOLATE, ANTIFERROMAGNETIC EXCHANGE, BR, CH3, COMPLEXES, CRYSTAL-STRUCTURE, LIGANDS, MAGNETIC-PROPERTIES, manganese, manganocene, NICKEL, nickelocene, pyrazolates, REACTIVITY}, isbn = {0008-4042}, url = {://000077277900003}, author = {Storr, A. and Summers, D. A. and Thompson, R. C.} } @article {4412, title = {Transition metal azolates from metallocenes. Part 3: Polymeric manganese(II) and nickel(II) pyrazolates; synthesis, characterization, and magnetochemistry}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {76}, number = {8}, year = {1998}, note = {ISI Document Delivery No.: 143VNTimes Cited: 13Cited Reference Count: 37}, month = {Aug}, pages = {1130-1137}, type = {Article}, abstract = {Direct reactions of nickelocene and manganocene with molten pyrazoles in an inert atmosphere or under vacuum have led to the isolation of the following metal pyrazolate compounds: [Ni(4-Xpz)(2)](x) (where X = EI, CI and pz = pyrazolate); [M(4-Xdmpz)(2)](x) (where X = H, CH3, Cl, Br and M = Ni, Mn and dmpz = 3,5-dimethylpyazolate); and [Mn(4-Xpz)(2)(4-XpzH)](x) (where X = Cl, Br and pzH = pyrazole). On the basis of indirect evidence all compounds are considered to have extended chain structures with metal ions linked in chains by double bridging pyrazolates. The two [Ni(4-Xpz)2], compounds are diamagnetic while all others are paramagnetic. Variable temperature magnetic susceptibility studies on the paramagnetic compounds reveal antiferromagnetic coupling between neighbouring metal ions. Analysis of the magnetic data (Hamiltonian of the form II = -2J Sigma S-i S-j) yields values of the exchange coupling constant J of -14 to -17 cm(-1) for the [Ni(4-Xdmpz)(2)](x) compounds, -1.2 to -2.1 cm(-1) for the [Mn(4-Xdmpz)(2)](x) compounds, and -0.41 cm(-1) for the [Mn(4-Xpz)(2)(4-XpzH)](x) compounds.}, keywords = {3, 5-DIMETHYLPYRAZOLATE, ANTIFERROMAGNETIC EXCHANGE, BR, CH3, COMPLEXES, CRYSTAL-STRUCTURE, LIGANDS, MAGNETIC-PROPERTIES, manganese, manganocene, NICKEL, nickelocene, pyrazolates, REACTIVITY}, isbn = {0008-4042}, url = {://000077277900003}, author = {Storr, A. and Summers, D. A. and Thompson, R. C.} } @article {3949, title = {Synthesis and characterization of the mixed valence Cu(I)/Cu(II) 3,5-bis(trifluoromethyl)-pyrazolate complex, [Cu(II)(2)Cu(I)(F(6)dmpz)(5)]}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {75}, number = {5}, year = {1997}, note = {ISI Document Delivery No.: XF492Times Cited: 18Cited Reference Count: 17}, month = {May}, pages = {491-498}, type = {Article}, abstract = {{The reaction of molten 3,5-bis(trifluoromethyl)pyrazole (F(6)dmpzH) with copper metal shot under an atmosphere of dioxygen yields the green trimetallic mixed valence [Cu(II)(2)Cu(I)(F(6)dmpz)(5)]. Crystals of [Cu(II)(2)Cu(I)F(6)dmpz)(5)] are triclinic}, keywords = {3, 5-bis(trifluoromethyl)pyrazolates, ANTIFERROMAGNETISM, copper, COPPER(II) COMPLEX, MAGNETIC-PROPERTIES, METAL PYRAZOLATE POLYMERS, RAY CRYSTAL-STRUCTURE, STRUCTURE, trimetallic, X-RAY}, isbn = {0008-4042}, url = {://A1997XF49200003}, author = {Ehlert, M. K. and Storr, A. and Summers, D. A. and Thompson, R. C.} } @article {3949, title = {Synthesis and characterization of the mixed valence Cu(I)/Cu(II) 3,5-bis(trifluoromethyl)-pyrazolate complex, [Cu(II)(2)Cu(I)(F(6)dmpz)(5)]}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {75}, number = {5}, year = {1997}, note = {ISI Document Delivery No.: XF492Times Cited: 18Cited Reference Count: 17}, month = {May}, pages = {491-498}, type = {Article}, abstract = {{The reaction of molten 3,5-bis(trifluoromethyl)pyrazole (F(6)dmpzH) with copper metal shot under an atmosphere of dioxygen yields the green trimetallic mixed valence [Cu(II)(2)Cu(I)(F(6)dmpz)(5)]. Crystals of [Cu(II)(2)Cu(I)F(6)dmpz)(5)] are triclinic}, keywords = {3, 5-bis(trifluoromethyl)pyrazolates, ANTIFERROMAGNETISM, copper, COPPER(II) COMPLEX, MAGNETIC-PROPERTIES, METAL PYRAZOLATE POLYMERS, RAY CRYSTAL-STRUCTURE, STRUCTURE, trimetallic, X-RAY}, isbn = {0008-4042}, url = {://A1997XF49200003}, author = {Ehlert, M. K. and Storr, A. and Summers, D. A. and Thompson, R. C.} } @article {4117, title = {Transition metal azolates from metallocenes .1. Dimetallic and trimetallic cyclopentadienyl nickel pyrazolates, synthesis and structural studies}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {75}, number = {7}, year = {1997}, note = {ISI Document Delivery No.: XR886Times Cited: 10Cited Reference Count: 23}, month = {Jul}, pages = {949-958}, type = {Article}, abstract = {{The reactions of nickelocene with pyrazoles in benzene solution have resulted in the isolation of either dimeric compounds, [CpNi(mu-pz{\textquoteright})](2), (room temperature conditions) or trimetallic complexes, [CpNi(mu-pz {\textquoteright}{\textquoteright})(2)](2)Ni, (elevated temperature conditions). Both dimeric and trimetallic species were obtained as red crystalline materials and X-ray structural investigations are reported for representative samples of each type. Structural features are interpreted and compared with similar, previously reported, nickel pyrazolate structures. Crystals of [CpNi(3,5-diMepz)](2) (C20H24N4Ni2), 1, are orthorhombic}, keywords = {3, 5-DIMETHYLPYRAZOLATE COMPLEXES, BR, CH3, CRYSTAL, crystal structures, CYCLOPENTADIENYL, MAGNETIC-PROPERTIES, MOLECULAR-STRUCTURES, NICKEL, nickelocene, POLYMERS, pyrazolates}, isbn = {0008-4042}, url = {://A1997XR88600004}, author = {Rettig, S. J. and Storr, A. and Summers, D. A. and Thompson, R. C. and Trotter, J.} } @article {4117, title = {Transition metal azolates from metallocenes .1. Dimetallic and trimetallic cyclopentadienyl nickel pyrazolates, synthesis and structural studies}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {75}, number = {7}, year = {1997}, note = {ISI Document Delivery No.: XR886Times Cited: 10Cited Reference Count: 23}, month = {Jul}, pages = {949-958}, type = {Article}, abstract = {{The reactions of nickelocene with pyrazoles in benzene solution have resulted in the isolation of either dimeric compounds, [CpNi(mu-pz{\textquoteright})](2), (room temperature conditions) or trimetallic complexes, [CpNi(mu-pz {\textquoteright}{\textquoteright})(2)](2)Ni, (elevated temperature conditions). Both dimeric and trimetallic species were obtained as red crystalline materials and X-ray structural investigations are reported for representative samples of each type. Structural features are interpreted and compared with similar, previously reported, nickel pyrazolate structures. Crystals of [CpNi(3,5-diMepz)](2) (C20H24N4Ni2), 1, are orthorhombic}, keywords = {3, 5-DIMETHYLPYRAZOLATE COMPLEXES, BR, CH3, CRYSTAL, crystal structures, CYCLOPENTADIENYL, MAGNETIC-PROPERTIES, MOLECULAR-STRUCTURES, NICKEL, nickelocene, POLYMERS, pyrazolates}, isbn = {0008-4042}, url = {://A1997XR88600004}, author = {Rettig, S. J. and Storr, A. and Summers, D. A. and Thompson, R. C. and Trotter, J.} } @article {4117, title = {Transition metal azolates from metallocenes .1. Dimetallic and trimetallic cyclopentadienyl nickel pyrazolates, synthesis and structural studies}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {75}, number = {7}, year = {1997}, note = {ISI Document Delivery No.: XR886Times Cited: 10Cited Reference Count: 23}, month = {Jul}, pages = {949-958}, type = {Article}, abstract = {{The reactions of nickelocene with pyrazoles in benzene solution have resulted in the isolation of either dimeric compounds, [CpNi(mu-pz{\textquoteright})](2), (room temperature conditions) or trimetallic complexes, [CpNi(mu-pz {\textquoteright}{\textquoteright})(2)](2)Ni, (elevated temperature conditions). Both dimeric and trimetallic species were obtained as red crystalline materials and X-ray structural investigations are reported for representative samples of each type. Structural features are interpreted and compared with similar, previously reported, nickel pyrazolate structures. Crystals of [CpNi(3,5-diMepz)](2) (C20H24N4Ni2), 1, are orthorhombic}, keywords = {3, 5-DIMETHYLPYRAZOLATE COMPLEXES, BR, CH3, CRYSTAL, crystal structures, CYCLOPENTADIENYL, MAGNETIC-PROPERTIES, MOLECULAR-STRUCTURES, NICKEL, nickelocene, POLYMERS, pyrazolates}, isbn = {0008-4042}, url = {://A1997XR88600004}, author = {Rettig, S. J. and Storr, A. and Summers, D. A. and Thompson, R. C. and Trotter, J.} } @article {4116, title = {Transition metal azolates from metallocenes .2. Synthesis, X-ray structure, and magnetic properties of a three-dimensional polymetallic Iron(II) imidazolate complex, a low-temperature weak ferromagnet}, journal = {Journal of the American Chemical Society}, volume = {119}, number = {37}, year = {1997}, note = {ISI Document Delivery No.: XW696Times Cited: 57Cited Reference Count: 49}, month = {Sep}, pages = {8675-8680}, type = {Article}, abstract = {{The reaction of ferrocene with molten imidazole at 150 degrees C yielded pale yellow crystals of composition [Fe-3(imid)(6)(imidH)(2)](x). Crystals of [Fe-3(imid)(6)(imidH)(2)](x) are monoclinic}, keywords = {3, 5-DIMETHYLPYRAZOLATE, BRIDGED COMPLEXES, COPPER(II) COMPLEXES, CRYSTAL-STRUCTURE, DINUCLEAR COMPLEX, EXCHANGE INTERACTION, MOLECULAR-STRUCTURES, MONONUCLEAR, PYRAZOLATE POLYMERS, ROUTE}, isbn = {0002-7863}, url = {://A1997XW69600011}, author = {Rettig, S. J. and Storr, A. and Summers, D. A. and Thompson, R. C. and Trotter, J.} } @article {4116, title = {Transition metal azolates from metallocenes .2. Synthesis, X-ray structure, and magnetic properties of a three-dimensional polymetallic Iron(II) imidazolate complex, a low-temperature weak ferromagnet}, journal = {Journal of the American Chemical Society}, volume = {119}, number = {37}, year = {1997}, note = {ISI Document Delivery No.: XW696Times Cited: 57Cited Reference Count: 49}, month = {Sep}, pages = {8675-8680}, type = {Article}, abstract = {{The reaction of ferrocene with molten imidazole at 150 degrees C yielded pale yellow crystals of composition [Fe-3(imid)(6)(imidH)(2)](x). Crystals of [Fe-3(imid)(6)(imidH)(2)](x) are monoclinic}, keywords = {3, 5-DIMETHYLPYRAZOLATE, BRIDGED COMPLEXES, COPPER(II) COMPLEXES, CRYSTAL-STRUCTURE, DINUCLEAR COMPLEX, EXCHANGE INTERACTION, MOLECULAR-STRUCTURES, MONONUCLEAR, PYRAZOLATE POLYMERS, ROUTE}, isbn = {0002-7863}, url = {://A1997XW69600011}, author = {Rettig, S. J. and Storr, A. and Summers, D. A. and Thompson, R. C. and Trotter, J.} } @article {4116, title = {Transition metal azolates from metallocenes .2. Synthesis, X-ray structure, and magnetic properties of a three-dimensional polymetallic Iron(II) imidazolate complex, a low-temperature weak ferromagnet}, journal = {Journal of the American Chemical Society}, volume = {119}, number = {37}, year = {1997}, note = {ISI Document Delivery No.: XW696Times Cited: 57Cited Reference Count: 49}, month = {Sep}, pages = {8675-8680}, type = {Article}, abstract = {{The reaction of ferrocene with molten imidazole at 150 degrees C yielded pale yellow crystals of composition [Fe-3(imid)(6)(imidH)(2)](x). Crystals of [Fe-3(imid)(6)(imidH)(2)](x) are monoclinic}, keywords = {3, 5-DIMETHYLPYRAZOLATE, BRIDGED COMPLEXES, COPPER(II) COMPLEXES, CRYSTAL-STRUCTURE, DINUCLEAR COMPLEX, EXCHANGE INTERACTION, MOLECULAR-STRUCTURES, MONONUCLEAR, PYRAZOLATE POLYMERS, ROUTE}, isbn = {0002-7863}, url = {://A1997XW69600011}, author = {Rettig, S. J. and Storr, A. and Summers, D. A. and Thompson, R. C. and Trotter, J.} } @article {3022, title = {MU-4-OXO-HEXAKIS(MU-3,5-DIMETHYLPYRAZOLATO-N,N{\textquoteright})TETRACOBALT(II)}, journal = {Acta Crystallographica Section C-Crystal Structure Communications}, volume = {50}, year = {1994}, note = {ISI Document Delivery No.: NY780Times Cited: 17Cited Reference Count: 11Part 7}, month = {Jul}, pages = {1023-1026}, type = {Article}, abstract = {The title compound, [Co4O(C5H7N2)6], consists of a central O atom coordinated by four Co(II) atoms which are themselves bridged in a pairwise fashion by six exobidentate 3,5-dimethylpyrazolate ligands. The coordination geometry about each Co(II) atom is that of a distorted tetrahedron.}, keywords = {3, 5-DIMETHYLPYRAZOLATE, COMPLEXES}, isbn = {0108-2701}, url = {://A1994NY78000021}, author = {Ehlert, M. K. and Rettig, S. J. and Storr, A. and Thompson, R. C. and Trotter, J.} } @article {3022, title = {MU-4-OXO-HEXAKIS(MU-3,5-DIMETHYLPYRAZOLATO-N,N{\textquoteright})TETRACOBALT(II)}, journal = {Acta Crystallographica Section C-Crystal Structure Communications}, volume = {50}, year = {1994}, note = {ISI Document Delivery No.: NY780Times Cited: 17Cited Reference Count: 11Part 7}, month = {Jul}, pages = {1023-1026}, type = {Article}, abstract = {The title compound, [Co4O(C5H7N2)6], consists of a central O atom coordinated by four Co(II) atoms which are themselves bridged in a pairwise fashion by six exobidentate 3,5-dimethylpyrazolate ligands. The coordination geometry about each Co(II) atom is that of a distorted tetrahedron.}, keywords = {3, 5-DIMETHYLPYRAZOLATE, COMPLEXES}, isbn = {0108-2701}, url = {://A1994NY78000021}, author = {Ehlert, M. K. and Rettig, S. J. and Storr, A. and Thompson, R. C. and Trotter, J.} } @article {3022, title = {MU-4-OXO-HEXAKIS(MU-3,5-DIMETHYLPYRAZOLATO-N,N{\textquoteright})TETRACOBALT(II)}, journal = {Acta Crystallographica Section C-Crystal Structure Communications}, volume = {50}, year = {1994}, note = {ISI Document Delivery No.: NY780Times Cited: 17Cited Reference Count: 11Part 7}, month = {Jul}, pages = {1023-1026}, type = {Article}, abstract = {The title compound, [Co4O(C5H7N2)6], consists of a central O atom coordinated by four Co(II) atoms which are themselves bridged in a pairwise fashion by six exobidentate 3,5-dimethylpyrazolate ligands. The coordination geometry about each Co(II) atom is that of a distorted tetrahedron.}, keywords = {3, 5-DIMETHYLPYRAZOLATE, COMPLEXES}, isbn = {0108-2701}, url = {://A1994NY78000021}, author = {Ehlert, M. K. and Rettig, S. J. and Storr, A. and Thompson, R. C. and Trotter, J.} } @article {2766, title = {BIOMIMETIC DEGRADATION OF LIGNIN}, journal = {Journal of Biotechnology}, volume = {30}, number = {1}, year = {1993}, note = {ISI Document Delivery No.: LP201Times Cited: 14Cited Reference Count: 37COLLOQUIUM ON LIGNIN BIODEGRADATION AND PRACTICAL UTILIZATIONJUN 27-30, 1990TRIESTE, ITALYINT CTR GENET ENGN \& BIOTECHNOL}, month = {Jul}, pages = {15-26}, type = {Proceedings Paper}, abstract = {The ligninolytic cultures of Phenarochaete chrysosporium produce two major groups of lignin degrading enzymes, the lignin peroxidase (Tien and Kirk, 1983) and the manganese-dependent peroxidase (Kuwahara et al., 1984). Both enzymes are hemeproteins and catalyze the oxidation of lignin model compounds by one-electron oxidations. The catalytic cycle of both enzymes involves the two-electron oxidation of iron(III) protoporphyrin IX, the prosthetic group of both enzymes, by hydrogen peroxide to give the highly reactive oxoiron(IV) protoporphyrin IX pi-cation radical, which returns to its resting state after two separate one-electron reductions by the substrates. The oxidation of simple metalloporphyrins can give similar highly oxidized species corresponding to the catalytic intermediates of the hemeprotein peroxidases. In the case of iron porphyrins (Groves et al., 1979; Chin et al., 1977) the oxidized intermediate is an oxoiron(IV) porphyrin cation radical and in the case of manganese porphyrins, the oxidized species is an oxomanganese(V) porphyrin (Groves et al., 1980). Shimada et al. (1977, 1984) have used commercially available metalloporphyrins as models of the lignin degrading enzymes. We have synthesized and used metalloporphyrins 1-4 (see Fig. 2) as biomimetic catalysts for lignin oxidation (Dolphin et al., 1987; Cui and Dolphin, 1989; Cui, 1990). The chloro substituents on the phenyl rings provide steric protection to increase the stability of the porphyrins (1-4) towards excess oxidants and the chlorines on the porphyrin periphery make 3 and 4 more powerful catalysts by increasing the redox potential at the metal centre.}, keywords = {3, 4-DIMETHOXYBENZYL ALCOHOL, DEGRADING ENZYME, DIARYLPROPANE OXYGENASE, HEME-ENZYME, LIGNIN PEROXIDASE, METALLOPORPHYRIN, MN-DEPENDENT PEROXIDASE, MODEL-COMPOUND, ORGANIC MEDIA, PEROXIDASE, PHANEROCHAETE-CHRYSOSPORIUM, porphyrins, RING CLEAVAGE, WHITE ROT BASIDIOMYCETE}, isbn = {0168-1656}, url = {://A1993LP20100004}, author = {Cui, F. T. and Wijesekera, T. and Dolphin, D. and Farrell, R. and Skerker, P.} } @article {2790, title = {OCTAMOLYBDENUM OXO-PYRAZOLATE CLUSTERS - SYNTHESES, CHARACTERIZATION, AND CRYSTAL AND MOLECULAR-STRUCTURES OF THE MO(V)/MO(VI) AND MO(VI) OCTAMOLYBDENUM CLUSTERS MO8(PZ)6O18(PZH)6 AND MO8(PZ)6O21(PZH)6}, journal = {Inorganic Chemistry}, volume = {32}, number = {23}, year = {1993}, note = {ISI Document Delivery No.: MG613Times Cited: 20Cited Reference Count: 36}, month = {Nov}, pages = {5176-5182}, type = {Article}, abstract = {{Two octamolybdenum compounds, containing both bridging pyrazolate and terminal pyrazole ligands, have been prepared by the reaction of molten pyrazole with molybdenum oxides, and their structures have been determined by single-crystal X-ray diffraction. Crystals of Mo8(pz)6O18(pzH)6.2pzH (1;pzH=pyrazole, C3H4N2; pz = pyrazolate anion, C3H3N2) are monoclinic, space group C2/c, with a = 23.026(3) angstrom}, keywords = {3, 5-DIMETHYLPYRAZOLATE, CATALYSIS, CHEMISTRY, COMPLEXES, HETEROPOLY, MAGNETIC-PROPERTIES, MOLYBDATES, MOLYBDENUM, OXYGEN, POLYMERS}, isbn = {0020-1669}, url = {://A1993MG61300039}, author = {Ehlert, M. K. and Rettig, S. J. and Storr, A. and Thompson, R. C. and Trotter, J.} } @article {2790, title = {OCTAMOLYBDENUM OXO-PYRAZOLATE CLUSTERS - SYNTHESES, CHARACTERIZATION, AND CRYSTAL AND MOLECULAR-STRUCTURES OF THE MO(V)/MO(VI) AND MO(VI) OCTAMOLYBDENUM CLUSTERS MO8(PZ)6O18(PZH)6 AND MO8(PZ)6O21(PZH)6}, journal = {Inorganic Chemistry}, volume = {32}, number = {23}, year = {1993}, note = {ISI Document Delivery No.: MG613Times Cited: 20Cited Reference Count: 36}, month = {Nov}, pages = {5176-5182}, type = {Article}, abstract = {{Two octamolybdenum compounds, containing both bridging pyrazolate and terminal pyrazole ligands, have been prepared by the reaction of molten pyrazole with molybdenum oxides, and their structures have been determined by single-crystal X-ray diffraction. Crystals of Mo8(pz)6O18(pzH)6.2pzH (1;pzH=pyrazole, C3H4N2; pz = pyrazolate anion, C3H3N2) are monoclinic, space group C2/c, with a = 23.026(3) angstrom}, keywords = {3, 5-DIMETHYLPYRAZOLATE, CATALYSIS, CHEMISTRY, COMPLEXES, HETEROPOLY, MAGNETIC-PROPERTIES, MOLYBDATES, MOLYBDENUM, OXYGEN, POLYMERS}, isbn = {0020-1669}, url = {://A1993MG61300039}, author = {Ehlert, M. K. and Rettig, S. J. and Storr, A. and Thompson, R. C. and Trotter, J.} } @article {2790, title = {OCTAMOLYBDENUM OXO-PYRAZOLATE CLUSTERS - SYNTHESES, CHARACTERIZATION, AND CRYSTAL AND MOLECULAR-STRUCTURES OF THE MO(V)/MO(VI) AND MO(VI) OCTAMOLYBDENUM CLUSTERS MO8(PZ)6O18(PZH)6 AND MO8(PZ)6O21(PZH)6}, journal = {Inorganic Chemistry}, volume = {32}, number = {23}, year = {1993}, note = {ISI Document Delivery No.: MG613Times Cited: 20Cited Reference Count: 36}, month = {Nov}, pages = {5176-5182}, type = {Article}, abstract = {{Two octamolybdenum compounds, containing both bridging pyrazolate and terminal pyrazole ligands, have been prepared by the reaction of molten pyrazole with molybdenum oxides, and their structures have been determined by single-crystal X-ray diffraction. Crystals of Mo8(pz)6O18(pzH)6.2pzH (1;pzH=pyrazole, C3H4N2; pz = pyrazolate anion, C3H3N2) are monoclinic, space group C2/c, with a = 23.026(3) angstrom}, keywords = {3, 5-DIMETHYLPYRAZOLATE, CATALYSIS, CHEMISTRY, COMPLEXES, HETEROPOLY, MAGNETIC-PROPERTIES, MOLYBDATES, MOLYBDENUM, OXYGEN, POLYMERS}, isbn = {0020-1669}, url = {://A1993MG61300039}, author = {Ehlert, M. K. and Rettig, S. J. and Storr, A. and Thompson, R. C. and Trotter, J.} } @article {7203, title = {IRON PORPHYRIN CATALYZED OXIDATION OF LIGNIN MODEL COMPOUNDS - THE OXIDATION OF VERATRYL ALCOHOL AND VERATRYL ACETATE}, journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie}, volume = {70}, number = {8}, year = {1992}, note = {ISI Document Delivery No.: JW564Times Cited: 13Cited Reference Count: 43}, month = {Aug}, pages = {2314-2318}, type = {Article}, abstract = {meso-Tetra(2,6-dichloro-3-sulfonatophenyl)porphyrin iron chloride catalyzes the oxidation of 3,4-dimethoxybenzyl alcohol (veratryl alcohol) in aqueous solution to give veratraldehyde along with demethoxylation and ring-cleavage products. The isolation of a direct ring-cleavage product from the oxidation of veratryl acetate in aqueous solution supports the previously proposed ring-cleavage mechanisms. The oxidation in methanol, however, does not lead to ring-cleavage products. When veratryl alcohol was oxidized in methanol, solvent was found to be incorporated into the 3-position of veratryl alcohol, giving new insight into the mechanism of oxidation.}, keywords = {3, 4-DIMETHOXYBENZYL ALCOHOL, BASIDIOMYCETE PHANEROCHAETE-CHRYSOSPORIUM, BOND-CLEAVAGE, C, CLEAVAGE, DEGRADING ENZYME, DIARYLPROPANE OXYGENASE, EXTRACELLULAR, HEME-ENZYME, LIGNINASES, RING, SPECTRAL CHARACTERIZATION, WHITE ROT BASIDIOMYCETE}, isbn = {0008-4042}, url = {://A1992JW56400025}, author = {Cui, F. T. and Dolphin, D.} }