ISSN:
1573-1111
Keywords:
crystal structure
;
X-ray crystallography
;
gossypol
;
inclusion complexes
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The crystal structure of a 2: 1 inclusion complex of gossypol withm-xylene has been determined by X-ray structure analysis. The crystals of C30H30O8·0.5C8 H10 are triclinic, space groupPl−,a = 8.478(1),b = 14.087(2),c = 14.411(2) Å, α = 115,39(1), β = 75.11(1), γ = 86.80(1)°,V = 1475.2(4) Å3,Z = 2,D x = 1.29 g cm−3,T = 295 K, μ(CuK α) = 7.01 cm−1. The structure has been solved by direct methods and refined to the finalR value of 0.079 for 3910 observed reflections. The gossypol molecules are linked by intermolecular hydrogen bonds and form bimolecular layers parallel to the ‘ab’ plane. Disorderedm-xylene molecules occupy cavities between these layers. All polar groups of the gossypol molecule are packed in the interior of the bilayer while non-polar groups are directed outwards. An analysis of the crystal packing of other inclusion complexes of gossypol shows that such bilayers are formed in four complexes and three of those structures are generically related to each other.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01041888
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