A second monoclinic polymorph of 3 beta-chlorocholest-5-ene

作者：Khan Mohd Shaheen; Sulaiman Othman; Mohamed Issam Ahmed; Yeap Chin Sing; Fun Hoong Kun^*

来源：Acta Crystallographica Section E-Structure Reports Online, 2010, 66: O1249-U63.

DOI：10.1107/S1600536810015722

The title compound, C(27)H(45)Cl, is a second monoclinic polymorph which crystallizes in the space group P2(1) with four crystallographically independent molecules in the asymmetric unit. The structure was previously reported [Bernal et al. (1940). Philos. Trans. R. Soc. London Ser. B, 239, 135-182; Vani & Vijayan (1979). Mol. Cryst. Liq. Cryst. 51, 253-264], also in the space group P2(1), but with two unique molecules in the asymmetric unit. As in the previously reported structures, rings A and C in the molecule adopt chair conformations with half-chair conformations for rings B and D. The ring junctions B-C and C-D are trans, whereas the junction A-B is quasitrans. In the crystal structure, molecules are arranged in a head-to-tail fashion along a and are stacked along the b axis.

• 出版日期2010-6