Results The 13C NMR chemical shifts for a series of disulfides (7-151, thiosulfinates (16-24), thiosulfonates (25-33), sulfinyl sulfones (34-36), and a-disulfones (37-41) are shown in Tables I and 11. The assignments were made by off-resonance decoupling techniques and by observation of the expected downfield shifts owing to changes in the electronegativity of divalent sulfur after oxidation. The 13C NMR substituent effects of thiosulfinates (2) and ...