@article {EJIC:EJIC201501272,
	title = {Hydroelementation of Unsaturated C{\textendash}C Bonds Catalyzed by Metal Scorpionate Complexes},
	journal = {European Journal of Inorganic Chemistry},
	volume = {2016},
	number = {15-16},
	year = {2016},
	pages = {2391{\textendash}2402},
	abstract = {Tridentate scorpionate ligands have a rich history in coordination chemistry. In the past two decades, metal complexes bearing scorpionate ligands have found increasing utility as catalysts for a variety of useful transformations. This microreview focuses on the utility of scorpionate ligands in hydroelementation of carbon{\textendash}carbon unsaturated bonds, focusing specifically on hydrothiolation, hydroamination, hydroalkoxylation and hydrophosphinylation of alkenes and alkynes. In each example, the solid phase and solution phase coordination and fluxionality of the scorpionate ligand will be discussed.},
	keywords = {ALKENES, ALKYNES, Hydroalkoxylation, HYDROAMINATION, Hydroelementation, Hydrophosphinylation, Hydrothiolation, Scorpionate ligands},
	issn = {1099-0682},
	doi = {10.1002/ejic.201501272},
	url = {http://dx.doi.org/10.1002/ejic.201501272},
	author = {Wathier, Matthew and Love, Jennifer A.}
}
@article {2495,
	title = {Broadening the Scope of Group 4 Hydroamination Catalysis Using a Tethered Ureate Ligand},
	journal = {Journal of the American Chemical Society},
	volume = {131},
	number = {51},
	year = {2009},
	note = {ISI Document Delivery No.: 543YATimes Cited: 12Cited Reference Count: 34Leitch, David C. Payne, Philippa R. Dunbar, Christine R. Schafer, Laurel L.},
	month = {Dec},
	pages = {18246-+},
	type = {Article},
	abstract = {A broadly applicable group-4-based precatalyst for the hydroamination of primary and secondary amines was developed. Screening experiments involving a series of amide and urea proligands led to the discovery of a tethered bis(ureate) zirconium complex with unprecedented reactivity in the intermolecular hydroamination of alkynes and the intramolecular hydroamination of alkenes. This catalyst system is effective with primary and secondary amines, 1,2-disubstituted alkenes, and heteroatom-containing functional groups, including ethers, silanes, amines, and heteroaromatics. The gem-disubstituent effect is not required for cyclization. The catalyst is generally regioselective for the anti-Markovnikov product of intermolecular alkyne hydroamination, and chemoselective for hydroamination over alpha-alkylation when forming 6- and 7-membered rings from aminoalkenes.},
	keywords = {ALKYNES, AMIDATE COMPLEXES, AMINES, AMINOALKENES, BOND FORMATION, INTRAMOLECULAR HYDROAMINATION, METAL-CATALYSTS, TITANIUM, UNACTIVATED ALKENES, ZIRCONIUM},
	isbn = {0002-7863},
	url = {<Go to ISI>://000273615800028},
	author = {Leitch, D. C. and Payne, P. R. and Dunbar, C. R. and Schafer, L. L.}
}
@article {2363,
	title = {Selective C-H Activation alpha to Primary Amines. Bridging Metallaaziridines for Catalytic, Intramolecular alpha-Alkylation},
	journal = {Journal of the American Chemical Society},
	volume = {131},
	number = {6},
	year = {2009},
	note = {ISI Document Delivery No.: 427PWTimes Cited: 22Cited Reference Count: 28Bexrud, Jason A. Eisenberger, Patrick Leitch, David C. Payne, Philippa R. Schafer, Laurel L.},
	month = {Feb},
	pages = {2116-+},
	type = {Article},
	abstract = {Selective alpha-C-H activation results in the synthesis of the first bridging metallaaziridine complex for the catalytic alpha-alkylation of primary amines. Reaction development led to the preparation of new Zr 2-pyridonate complexes for this useful transformation. No nitrogen protecting groups are required for this reaction, which is capable of assembling quaternary chiral centers a to nitrogen. Preliminary mechanistic investigations suggest bridging metallaaziridine species are the catalytically active intermediates for this alpha-functionalization reaction, while monomeric imido complexes furnish azepane hydroamination products.},
	keywords = {ALKENES, ALKYNES, BOND ACTIVATION, COMPLEXES, GENERATION, HYDROAMINOALKYLATION, INTERMOLECULAR HYDROAMINATION, NITROGEN, REACTIVITY, UNACTIVATED OLEFINS},
	isbn = {0002-7863},
	url = {<Go to ISI>://000264792200038},
	author = {Bexrud, J. A. and Eisenberger, P. and Leitch, D. C. and Payne, P. R. and Schafer, L. L.}
}
@article {922,
	title = {Scandium-catalyzed intramolecular hydroamination. Development of a highly active cationic catalyst},
	journal = {Organometallics},
	volume = {23},
	number = {10},
	year = {2004},
	note = {ISI Document Delivery No.: 818FNTimes Cited: 100Cited Reference Count: 37},
	month = {May},
	pages = {2234-2237},
	type = {Article},
	abstract = {The scandium-catalyzed intramolecular hydroamination of alkynes and alkenes is reported. Complex structure/catalyst activity investigations resulted in the identification of a highly catalytically active cationic, beta-diketiminato scandium complex.},
	keywords = {ALKENES, ALKYNES, AMIDO COMPLEXES, BETA-DIKETIMINATO LIGANDS, DERIVATIVES, GROUP-3 METALS, ORGANOSCANDIUM, REACTIVITY, YTTRIUM, ZIRCONIUM},
	isbn = {0276-7333},
	url = {<Go to ISI>://000221231100006},
	author = {Lauterwasser, F. and Hayes, P. G. and Brase, S. and Piers, W. E. and Schafer, L. L.}
}
@article {619,
	title = {Diamidophosphine complexes of niobium(III) and (IV): imide formation via ancillary ligand decomposition},
	journal = {Inorganica Chimica Acta},
	volume = {350},
	year = {2003},
	note = {ISI Document Delivery No.: 700BTTimes Cited: 10Cited Reference Count: 32},
	month = {Jul},
	pages = {293-298},
	type = {Article},
	abstract = {The diamidophosphine complexes of niobium (CyPh)[NPN]NbCl(DME) (2), (CyPh)[NPN]NbCl2 (6), and (PhPh)[NPN]NbCl2 (9), where (RR{\textquoteright})[NPN]=RP(CH2SiMe2NR{\textquoteright})(2) have been prepared, isolated and characterized. Generation of (RR{\textquoteright})[NPN]NbCl(DME) species competes with the production of ((RR{\textquoteright})[NPN]NbCl)(2)(mu-N-2) and can be controlled with N-2 pressure. (CyPh)[NPN]NbCl2 spontaneously decomposes into (CyPh)[NPN]NbCl(=NPh) (7), CyP(CH2SiMe2)(2)NPh (8), and a paramagnetic impurity. Compound 7 was characterized by an X-ray diffraction study and its structural features are discussed. The Nb-N-imido bond length is 1.789(2) Angstrom with a Nb-N-imido-C bond angle of 167.9(2)degrees in a distorted square pyramidal structure. Reduction of (PhPh)[NPN]NbCl2 (9), with KC8 produced (PhPh)[NPN]NbCl(=NPh), PhP(CH2SiMe2)(2)NPh, and a paramagnetic impurity. (C) 2002 Elsevier Science B.V. All rights reserved.},
	keywords = {ALKYNES, COORDINATION, diamidophosphine ligands, imido, MECHANISM, MEDIATED IMINE METATHESIS, NIOBIUM, ORGANOIMIDO COMPLEXES, REDUCTION, ROUTE, Si-N bond cleavage, tantalum},
	isbn = {0020-1693},
	url = {<Go to ISI>://000184093300036},
	author = {Fryzuk,Michael D. and Shaver, M. P. and Patrick, B. O.}
}
@article {6989,
	title = {ORGANOMETALLIC NITROSYL CHEMISTRY .47. CYCLOPENTADIENYL(ETA(4)-TRANS-DIENE)NITROSYLMOLYBDENUM COMPLEXES AND THEIR REACTIVITIES TOWARD ACETYLENES AND PROTONIC ACIDS},
	journal = {Organometallics},
	volume = {10},
	number = {9},
	year = {1991},
	note = {ISI Document Delivery No.: GF405Times Cited: 19Cited Reference Count: 25},
	month = {Sep},
	pages = {3070-3080},
	type = {Article},
	abstract = {{Reduction of [Cp*Mo(NO)I2]2 [CP* = eta-5-C5Me5] by sodium amalgam in THF at -30-degrees-C in the presence of an isomeric mixture of (E)- and (Z)-1,3-pentadiene affords two isolable isomers of Cp*Mo(NO)(eta-4-trans-1,3-pentadiene), one yellow (1A) and one red (1B). The most significant feature of the solid-state molecular structure of 1A is the fact that the transoidal (E)-1,3-pentadiene ligand is coordinated to the molybdenum with its methyl substituent pointing away from the cyclopentadienyl ring. The spectroscopic properties of 1B are consistent with it possessing a similar orientation of its (Z)-1,3-diene methyl substituent. This observation establishes that even though the Cp*Mo(NO) fragment in 1A and 1B exerts the electronic influence to bind the diene ligands in a twisted, transoidal fashion, steric interactions determine which face of the diene ligand can best accommodate this electronic requirement. Cyclic voltammetry studies have been carried out on two representative diene-containing compounds, namely CpMo(NO)(eta-4-trans-2,5-dimethyl-2,4-hexadiene) and CpMo(NO)(eta-4-cis-2,3-dimethylbutadiene) (Cp = eta-5-C5H5), in order to establish the redox properties of these types of complexes. The cyclic voltammograms indicate that both diene complexes are reasonably stable with respect to addition of electrons, since no reduction behavior is observed to the limit of the CH2Cl2 solvent (ca. -2 V). On the other hand, each of the complexes is quite readily oxidized and each exhibits three irreversible oxidations before the solvent limit of ca. +2 V. These redox properties are in accord with the results of Fenske-Hall molecular orbital calculations previously performed on the CpMo(NO)(eta-4-butadiene) model systems. Consistently, CpMo(NO)(eta-4-trans-2,5-dimethyl-2,4-hexadiene) does not undergo concomitant reduction when treated with acetylenes but rather effects a coupling between the diene ligand and the alkyne to produce a eta-4 (eta-3, eta-1) ligand in which the eta-3-allyl portion of the ligand is oriented endo with respect to the cyclopentadienyl ring. Thus, when the alkyne employed is 1-phenylpropyne, the resulting complex is CpMo(NO)[eta-4-C(Me)2CHCHC(Me)2C(Me)C(Ph)] (2), whose molecular structure has been established by specialized NMR spectroscopic techniques and by single-crystal X-ray crystallography. The reaction between CpMo(NO)(eta-4-trans-2,5-dimethyl-2,4-hexadiene) and 1,7-octadiyne affords two major isomers of a similar organometallic product. Finally, the isolable products of the reactions between CpMo(NO)(eta-4-trans-diene) and HX (diene = 2,5-dimethyl-2,4-hexadiene},
	keywords = {ALKYNES, CHEMICAL-PROPERTIES, CHROMIUM, DIENES, LIGANDS},
	isbn = {0276-7333},
	url = {<Go to ISI>://A1991GF40500020},
	author = {Christensen, N. J. and Legzdins,Peter and Einstein, F. W. B. and Jones, R. H.}
}
