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Metal- versus ligand-centered oxidations in phenolato-vanadium and -cobalt complexes: Characterization of phenoxyl-cobalt(III) species
Citation key ISI:A1997XR23800020
Author Sokolowski, A and Adam, B and Weyhermuller, T and Kikuchi, A and Hildenbrand, K and Schnepf, R and Hildebrandt, P and Bill, E and Wieghardt, K
Pages 3702-3710
Year 1997
ISSN 0020-1669
Address 1155 16TH ST, NW, WASHINGTON, DC 20036
Journal Inorg. Chem.
Volume 36
Number 17
Month AUG 13
Publisher AMER CHEMICAL SOC
Abstract The coordination chemistry of the pendent-arm macrocycles 1,4,7-tris(3,5-dimethyl-2-hydroxybenzyl) 1,4,7-triazacyclononane, (LH3)-H-Me, 1,4,7-tris(3,5-di-tert-butyl-2-hydroxybenzyl)-1,4,7-triazacyolononane, (LH3)-H-BU, 1,4,7-tris(3-tert-butyl-5-methoxy-2-hydroxybenzyl)-1,4,7-triazacyclonona ne, (LH3)-H-OCH3, and Tolman's ligand 1,4-diisopropyl-7-(3,5-di-tert-butyl-2-hydroxybenzyl)-1,4,7-triazacyclon onane, (LH)-H-Pr, with vanadium and cobalt(III) has been studied. The following complexes containing a fac-N3O3 donor set have been synthesized: [(LVIII)-V-Me] (1), [(LVIV)-V-Me]PF6 (2), [((LH)-H-Me)V-V(O)]PF6 (3), [(LVIV)-V-Bu]PF6 (4), [(LVIV)-V-OCH3]PF6 (5), [(LCOIII)-C-Me] (6), [(LCoIII)-Co-Bu] (7), [(LCoIII)-Co-OCH3] (8). In addition, two complexes containing the (LCoIII)-Co-Pr fragment have been prepared: [L-Pr-Co-III(acac)](ClO4) (9) and {[(LCoIII)-Co-Pr(Cl(4)cat)]. CH3CN (10), where acac(-) represents the ligand pentane-2,4-dionate and Cl(4)cat(2-) is tetrachlorocatecholate. Complexes 9 and 10 have been characterized by single-crystal X-ray crystallography: 9 crystallizes in the triclinic space group <P(1)over bar> with a = 9.493(1) Angstrom
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