PREPARATION AND OPTICAL AND ELECTRON SPIN RESONANCE SPECTRA OF SOME HEXACHLORO- AND PENTACHLOROALKOXOVANADATES(IV)

Several compounds of the type [R4N]2V(OR')Cl5 have been prepared from [(CH3)4N]2VCl6 and [(CH3CH2)4N]2VCl6. All compounds show normal, spin-only paramagnetism for a d1 ion at room temperature. The magnetic moments for the alkoxo complexes vary little with temperature. Electronic, infrared, and electron spin resonance spectra have been measured. Bonding coefficients for the pertinent molecular orbitals have been calculated. N π 2 2 and N σ 22 decrease with increasing length of alkoxo chain while N π 1 2 increases. Spin densities have been calculated for the equatorial Cl atoms from the bonding parameters. © 1969, American Chemical Society. All rights reserved.