Crystal and molecular structures of N-toluene-p-sulphonyliminodimethylsulphur(IV) and N-toluene-p-sulphonyliminotriphenylphosphorane: two sulphonyl-stabilised ylides

Abstract

Crystal structure analyses of the sulphur(IV) and phosphorane ylides (I) and (II), respectively, suggest d_π–p_π bonding between the ‘onium groups and the vicinal atoms, and in addition, allow direct comprarison to be made of the dimensions of (I) with those of the related compounds (III) and (IV).