VANADIUM(III) AND VANADIUM(IV) COMPLEXES WITH PYRAZINE IN ALCOHOL SOLUTION

Abstract

The V(III)-pyrazine system was examined spectroscopically in the isoamyl alcohol solution. An unstable, violet-red, binuclear vanadium(III) complex [V₂(pyraz)Cl₄]²⁺ was found to be formed. On exposure to air it was slowly converted into a sparingly soluble green vanadium(IV) compound, [VO(pyraz)OH]Cl.H₂O. This compound was examined by the analytical, spectroscopic (electronic and infra-red spectra) and magnetic methods.