Abstract
We have established parameters that enable the prediction of 13C NMR chemical shifts for carbons β and γ to a sulfoxide or sulfone oxygen(s). Carbons β were found to be moved upfield by ∼ 21 ppm and those γ downfield by ∼ 7.7 ppm in chloroform. We tested these parameters by sequentially oxidizing poly(butyl thirane) to its corresponding polysulfone and assigned the new peaks observed in the 13C NMR on the basis of their proximity to the oxygen atom(s).
Research sponsored by the Department of Education for Northern Ireland and the Ministry of Defence, Malvern, Worcs., UK