The conformation around two equivalent bonds linked to one central atom: diacyl sulphides and sulphonic acid anhydrides and thioanhydrides

Abstract

The conformations of the title compounds have been deduced from a dipole moment measurement in benzene solution. In all cases the C₂ form prevails, i.e.(A) and (C), with a dihedral angle τ of ca. 160 and 60°, respectively. Summarizing the available information, the conformation on two equivalent bonds linked to a central atom is the same as in the corresponding monofunctional derivatives, with slight distortion, if any. When, as in the case of nonplanar groups, there are two possibilities, the C₂ conformation is preferred to the C.