Lithium-cation and proton affinities of sulfoxides and sulfones: A fourier transform ion cyclotron resonance study

Abstract

The kinetic method was used for the quantitative determination of lithium-cation affinities by Fourier transform ion cyclotron resonance. This method was applied to a series of XYSO and XYSO 2 compounds. Proton basicities of the SO and SO 2 compounds were also determined. When comparison is made between Li + basicities and proton basicities, a linear regression encompassing XYSO and XYSO 2 families suggests that Li + may be bonded in a similar way to the SO and SO 2 moieties, that is, to only one oxygen on the latter. PM3 calculations support this hypothesis.