Co-ordination chemistry of macrocyclic polyethers. An unusual conformation of complexed 18-crown-6; X-ray crystal and molecular structure of a 1:2 host–guest complex of 18-crown-6 with benzenesulphonamide

Abstract

In the 1:2 host–guest complex formed between 1,4,7,10,13,16-hexaoxacyclo-octadecane (18-crown-6) and benzenesulphonamide, the crown ether adopts nearly the same conformation as the uncomplexed hexaether; the complex is held together mainly by N–H ⋯ O hydrogen bonds.