C. Hawkins, T. Kabanos
1989
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0
Influential Citations
37
Citations
Journal
Inorganic Chemistry
Abstract
The syntheses of the complexes [V(cat)(acac)], [V(cat)(bzac)], and [V(dtbc)(bzac)] are described, and the complexes' UV-visible, infrared, and mass spectral data are presented. The complexes are nonelectrolytes with a room-temperature magnetic moment of about 1.8 μb, consistent with the dvanadium(IV) system. The complexes show reversible one-electron reduction to the vanadium(III) state at -0.22, -0.26, and -0.37 V (NHE), respectively, in acetonitrile and at -0.39, -0.38, and -0.56 V (NHE), respectively, in dichloromethane. Oxidation to the vanadium(V) state does not occur at potentials less positive than 1.0 V, at which the catecholate ligands undergo oxidation. These mixed-ligand vanadium(IV) complexes are more stable to disproportionation than the tris(catecholato) and tris(β-diketonato) complexes, more stable to oxidation than the former complexes, and more stable to reduction than the latter.