Crystal structure of inclusion compounds: The complexes of thecis-syn-cis and thecis-anti-cis isomers of dicyclohexano-18-crown-6 with 4-methylbenzenesulfamide

The crystal structure of two complexes of the isomerscis-syn-cis (isomer A) andcis-anti-cis (isomer B) of dicyclohexano-18-crown-6 with 4-methylbenzenesulfamide have been determined by X-ray single crystal diffraction methods. The two structures have been solved by direct methods and refined to agreement values of 0.067 and 0.038 for isomers A and B respectively. The first isomer forms an inclusion compound with a host/guest ratio of 1 : I; the second one of I:2. The amino groups of the guest molecules are connected by N-H...O hydrogen bonds with oxygen atoms of the polyether molecules. The methyl groups of 4-methylbenzenesulfamide do not form hydrogen bonds./p]The host-guest interactions in the molecular complexes, the reciprocal influence of the two molecules on their conformation and the intermolecular contacts between the molecules in the crystal are discussed.