OXOVANADIUM(IV) COMPLEXES OF CYCLOPROPYLCARBO- AND CYCLOHEXYLACETOHYDROXAMIC ACIDS

摘要

A spectroscopic investigation of the reactions of VO2+ with cyclopropylcarbohydroxamic acid (CPAH) and cyclohexylacetohydroxamic acid (CHAH) in aqueous solution reveals the sole formation of 1:2 complexes at equilibrium. The stability constants (log beta(2) at 25 degrees C and I = 0.1 mol dm(-3)) are 21.45 and 17.60 for [VO(CPA)(2)] and [VO(CHA)(2)], respectively. Spectral and magnetic studies of the isolated complexes indicate five-coordination via the oxygen atoms of the hydroxamate group. [References: 21]