Vanadium-51 nuclear magnetic resonance study of sulphido- and oxosulphido-vanadate(V) species

Abstract

The three known monomeric sulphido- and oxosulphido-vanadium(V) species [VS₄]^3–, [VOS₃]^3–, and [VO₂S₂]^3– have been identified by high-field vanadium-51 n.m.r. spectroscopy, together with the previously unobserved ions [VO₃S]^3–, [V₂S₇]^4–, [O₃VSVO₃]^4–, [SO₂VSVO₂S]^4– and the monoprotonated monomers. No equilibria between monomeric species are observed other than for protonation. The observed vanadium chemical shifts can be accounted for quantititatively by simple molecular-orbital theory.