Summary
New vanadium(III) and oxovanadium(VI,V) dithio-carbamato complexes formulated as V(Rdtc)3, V(Rdtc)2Cl, VO(Rdtc)2, VO(Rdtc)Cl2, VO(Rdtc)2Cl and VO(Rdtc)3 (Rdtc = piperidine-, morpholine-, thiomorpholine- orN-methylpiperazinedithiocarbamate) have been characterized by elemental analyses, electrical conductance measurements, spectral (electronic and i.r.) studies and magnetic susceptibility measurements. The dithio ligands exhibit bidentate behaviour in all the complexes. The values for the ligand field parameters were determined from the electronic absorption spectra for the vanadium(III) derivatives; the nephelauxetic parameter is indicative of a weak covalency in the metal-ligand bond. The vanadium(III) tris-derivatives are suggested to have an octahedral geometry,D 3symmetry, while the complexes of oxovanadium(IV) may be five-coordinate with a tetragonalpyramidal geometry having the oxygen at the apex. Various tentative stereochemistries are proposed for the oxovanadium(V) derivatives depending on the stoichiometry of the complexes.
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Forghieri, F., Graziosi, G., Preti, C. et al. Cyclic substituted dithiocarbamates as ligands. Vanadium(III)and oxovanadium(IV, V) complexes. Transition Met Chem 8, 372–376 (1983). https://doi.org/10.1007/BF00618577
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DOI: https://doi.org/10.1007/BF00618577