@article {4548,
	title = {One-electron oxidation of paramagnetic chromium(II) alkyl complexes with alkyl halides: synthesis and structure of five-coordinate chromium(III) complexes},
	journal = {Journal of the Chemical Society-Dalton Transactions},
	number = {2},
	year = {1999},
	note = {ISI Document Delivery No.: 162JPTimes Cited: 18Cited Reference Count: 69},
	month = {Jan},
	pages = {147-154},
	type = {Article},
	abstract = {The reaction of square-planar, high-spin CrR[N(SiMe2CH2PPh2)(2)] (R = Me, CH2SiMe3) with alkyl halides (MeI, CF3CH2I, MeBr, PhCH2Cl) generates one-electron oxidation products Cr(R)X[N(SiMe2CH2PPh2)(2)], unusual examples of five-coordinate chromium(III) complexes. Cr(Me)Br[N(SiMe2CH2PPh2)(2)] and Cr(CH2SiMe3)Cl[N(SiMe2CH2PPh2)(2)] have structurally characterized. Alkylation of the latter complex with LiCH2SiMe3 gave a five-coordinate Cr(III) dialkyl complex Cr(CH2SiMe3)(2)[N(SiMe2CH2PPh2)(2)](2), which was structurally characterized as well. Attempts to isolate sterically unencumbered Cr(III) dialkyl (e.g., dimethyl) complexes resulted in decomposition. Addition of an excess of PhCH2Cl to {[(Ph2PCH2SiMe2)(2)N]Cr}(2)(mu-Cl)(2) resulted in halide-transfer to form CrCl2(TNF)[N(SiMe2CH2PPh2)(2)] in low yield. Reaction of the low-spin CrCp[N(SiMe2CH2PPh2)(2)] complex with PhCH2Cl, however, gave both Cr(Cp)(CH2Ph)[N(SiMe2CH2PPh2)(2)] and Cr(CP)Cl[N(SiMe2CH2CH2PPh2)(2)]. The five five-coordinate Cr(III) alkyl halide complexes do not polymerize ethylene at 60 degrees C and 1 atm; the dialkyl complex Cr(CH2SiMe3)(2)[N(SiMe2CH2PPh2)(2)] does catalyze polyethylene formation but is quickly deactivated. A discussion comparing the structural distortions observed in these five-coordinate high-spin d(3) Cr(III) complexes with those observed in the analogous low-spin d(6) Ir(III) complexes is presented.},
	keywords = {17-ELECTRON, 5-COORDINATE, ATOM TRANSFER-REACTIONS, CHEMISTRY, CRYSTAL-STRUCTURE, D6 ML5 COMPLEXES, NMR-SPECTROSCOPY, ORGANIC HALIDES, POLYMERIZATION, REACTIVITY},
	isbn = {0300-9246},
	url = {<Go to ISI>://000078342700010},
	author = {Fryzuk,Michael D. and Leznoff, D. B. and Rettig, S. J. and Young, V. G.}
}
@article {4247,
	title = {A cis-dioxomolybdenum(VI) complex, [Mo{N2C3H3C(Me)(2)O}(2)(O)(2)]},
	journal = {Acta Crystallographica Section C-Crystal Structure Communications},
	volume = {54},
	year = {1998},
	note = {ISI Document Delivery No.: ZL666Times Cited: 0Cited Reference Count: 11Part 4},
	month = {Apr},
	pages = {473-475},
	type = {Article},
	abstract = {In the cis-dioxomolybdenum(VI) complex bis[1-methyl-1-(1{\textendash}pyrazolyl) ethanolato-N-2,O]dioxomolybden [Mo(O)(2)(C6H9N2O)(2)] or C12H18MoN4O4, the Mo atom has distorted octahedral coordination to two (cis) oxo ligands, and two N and two O atoms of the two substituted pyrazole ligands. Mo-O-oxo bond distances [mean 1.698(6)Angstrom] correspond to double bonds, Mo-O-oxy [mean 1.951(2)Angstrom] to single bonds, and Mo-N bonds [mean 2,326(3)Angstrom] are lengthened as a result of the effect of the oxo ligands, which are trans to the N atoms.},
	keywords = {ATOM TRANSFER-REACTIONS},
	isbn = {0108-2701},
	url = {<Go to ISI>://000073458300013},
	author = {Ehlert, M. K. and Rettig, S. J. and Storr, A. and Trotter, J.}
}
@article {4247,
	title = {A cis-dioxomolybdenum(VI) complex, [Mo{N2C3H3C(Me)(2)O}(2)(O)(2)]},
	journal = {Acta Crystallographica Section C-Crystal Structure Communications},
	volume = {54},
	year = {1998},
	note = {ISI Document Delivery No.: ZL666Times Cited: 0Cited Reference Count: 11Part 4},
	month = {Apr},
	pages = {473-475},
	type = {Article},
	abstract = {In the cis-dioxomolybdenum(VI) complex bis[1-methyl-1-(1{\textendash}pyrazolyl) ethanolato-N-2,O]dioxomolybden [Mo(O)(2)(C6H9N2O)(2)] or C12H18MoN4O4, the Mo atom has distorted octahedral coordination to two (cis) oxo ligands, and two N and two O atoms of the two substituted pyrazole ligands. Mo-O-oxo bond distances [mean 1.698(6)Angstrom] correspond to double bonds, Mo-O-oxy [mean 1.951(2)Angstrom] to single bonds, and Mo-N bonds [mean 2,326(3)Angstrom] are lengthened as a result of the effect of the oxo ligands, which are trans to the N atoms.},
	keywords = {ATOM TRANSFER-REACTIONS},
	isbn = {0108-2701},
	url = {<Go to ISI>://000073458300013},
	author = {Ehlert, M. K. and Rettig, S. J. and Storr, A. and Trotter, J.}
}
@article {3435,
	title = {Rhenium and technetium complexes from pentadentate (N3O2) and tetradentate (N2O2) Schiff base ligands},
	journal = {Canadian Journal of Chemistry-Revue Canadienne De Chimie},
	volume = {73},
	number = {12},
	year = {1995},
	note = {ISI Document Delivery No.: TV232Times Cited: 16Cited Reference Count: 32},
	month = {Dec},
	pages = {2272-2281},
	type = {Article},
	abstract = {{The rhenium(V) and technetium(V) complexes: [ReO(apa)], [{ReO(epa)}O-2], and [TcOCl(epa)] have been prepared from a potentially pentadentate N3O2 ligand, N,N{\textquoteright}-3-azapentane-1,5-diylbis(3-(1-iminoethyl)-6-methyl-2H-pyran-2,4(3H) -dione) (H(3)apa), or a potentially tetradentate N2O2 ligand, N,N{\textquoteright}-ethylene-diylbis(3-(1-iminoethyl)-6-methyl-2H-pyran-2,4 (3H)-dione) (H(2)epa). The N2O2 complexes were synthesized in low yields. There was also evidence indicating that H(2)ppa, N,H{\textquoteright}-propylene-diylbis(3-(1-iminoethyl)-6-methyl-2H-pyran- 2,4(3H)-dione), hydrolyzed in the course of coordination, forms a rhenium complex of the bidentate monoprotic (O,O) dehydroacetate (dha(-)), [Re(dha)Cl-2(OPPh(3))(PPh(3))]. EtOH. The structure of this complex was determined by X-ray crystallography. Crystals of [Re(dha)Cl-2(OPPh(3))(PPh(3))]. EtOH (C44H37Cl2O5P2Re . C2H6O) are monoclinic},
	keywords = {AMINE PHENOL LIGANDS, ATOM TRANSFER-REACTIONS, CRYSTAL-STRUCTURES, dehydroacetic acetate based Schiff base ligands, N2O2 Schiff base, N3O2 Schiff base, OXO-COMPLEXES, oxygen transfer, rhenium, technetium, X-ray structures},
	isbn = {0008-4042},
	url = {<Go to ISI>://A1995TV23200022},
	author = {Luo, H. Y. and Liu, S. and Rettig, S. J. and Orvig, Chris}
}
