S-33 and O-17 N.M.R-Studies of Thiomolybdates and Thiotungstates

Abstract

Sulfur-33 and oxygen-17 n.m.r . studies are shown to have considerable potential in following the equilibration of the thiometallate anions [MS_nO₄-_n]^2- (M = W, Mo; n = 0-4) in aqueous solution. Chemical shift and linewidth data are presented for these ions. Variations in both the oxygen-17 and sulfur-33 shifts can be correlated with the lowest-energy electronic transition. Moreover, changes in the oxygen-17 and sulfur-33 chemical shift data can be correlated with the molybdenum-95 and tungsten-183 chemical shift values, which have been previously reported. The implications for the nature of the bonding in these anions are discussed.