ISSN:
1573-1111
Keywords:
crown ether
;
crystal structure
;
inclusion compound
;
isomers of dicyclohexano-18-crown-6
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract 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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01041890
Permalink