Identification of stereoisomers of mixed heteropoly anions. Mixed valence and triplet state electron spin resonance spectra of vanadium(IV)
Abstract
The existence of several isomers of the Keggin anions PVxW12 –xO40(3 +x)– and PVxMo12 –xO40(3 +x)–, (x= 1–4), is demonstrated by 31P n.m.r., e.s.r., and i.r. spectroscopy.