Correlations between nuclear magnetic resonance spectra and crystal structures. A carbon-13 nuclear magnetic resonance study in the solid state of the Group 15 xanthates [A(S2COR)3](A = AsIII, SbIII, or BiIII; R = Me, Et, or Pri)

Abstract

The ¹³C cross-polarisation magic angle spinning (c.p.m.a.s.) n.m.r. spectra of solid [A(S₂COR)₃](A = As^III or Sb^III; R = Me, Et, or Prⁱ; A = Bi^III; R = Me or Prⁱ) exhibit systematic features which correlate well with the known crystal structures. In the case of [Bi(S₂COEt)₃], for which no crystal structure is available, the ¹³C c.p.m.a.s. n.m.r. spectrum is consistent with this species crystallising as two polymorphs, and their gross structural features are deduced through the correlations of spectra with structures drawn from the preceding eight Group 15 xanthates. The species K(S₂COMe) and K(S₂COPrⁱ) have been studied similarly.