Crystallographic studies of intra‐ and inter‐ molecular interactions. Part VI. Crystal and molecular structure of N,N′‐dimethyl‐N′‐phenylsulphonylformamidine. Equalization of CN bond lengths in the amidine fragment as a result of substituent effects due to push–pull

Abstract

AbstractThe crystal and molecular structure of N,N‐dimethyl‐N′‐phenylsulphonylformamidine is solved by direct methods and refined to R = 0.041 for 935 reflections, Equalization of CN bond lengths in the amidine fragment is discussed in terms of a push—pull effect operating between the N,N‐dimethyl and SO2Ph groups. A significant role of the substituent at the functional carbon on the degree of π‐electron delocalization on the NCN fragment is interpreted by use of the HOSE model.