¹³C NMR analysis of sultones and sulphonate–sulphate anhydrides

Abstract

Abstract The 13 C NMR spectra of 20 compounds belonging to several types of monocyclic sultones and related ‘carbyl sulphates,’ including a series of fluorinated β‐sultones (1,2‐oxathietane 2,2‐dioxides), are reported. Chemical shift increment systems with n ‐alkanes as reference molecules are established for non‐fluorinated sultones: they show a much less pronounced deshielding effect on the carbon α to oxygen in β‐sultones than in the other series. Chemical shifts for the parent β‐sultone, predicted in two ways (linear or cyclic model compound), are found to be almost consistent with a purely additive scheme. In fluorinated β‐sultones the α‐substituent increments relative to perfluoroethanesultone are also derived.