Rajalakshmi, K. ; Pattabhi, Vasantha ; Venkatesan, C. S. ; Nadamuni, G. ; Srikrishna, A. (2001) Crystal and molecular structure of synthetic cholesterol compounds- Vitamin D3-analogues (I) 24(S)-hydroxy coprastan-3-one & (II) 24(R)-hydroxy coprastan-3-one Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, 369 (1). pp. 243-271. ISSN 1058-725X
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Official URL: http://www.tandfonline.com/doi/abs/10.1080/1058725...
Related URL: http://dx.doi.org/10.1080/10587250108030021
Abstract
The title compound I (24-(S)-Hydroxy Coprastan-3-one) crystallises in orthorhombic space group P212121 with Z=4. The unit cell dimensions are a=6.701(2)Å, b=11.506(8)Å, c=32.183(4)Å, V=2481(2)Å3, Dcal=1.077 Mg/m3. The title compound II (24-(R)-Hydroxy Coprastan-3-one) crystallises in orthorhombic space group P212121 with two molecules per assymetric unit and with Z=8. The Unit cell dimensions are a=10.954(2)Å, b=21.757(6)Å, c=21.130(7)Å, V=5035.0(2)Å3, Dcal=1.062 Mg/m3. In compound I and in both the molecules of compound II, the rings A, B & C are in chair conformation and the five membered ring D is in envelope conformation. The priority sequence attached to the chiral carbon C24 has "S" designation in compound I and "R" designation in compound II. The structures are stabilized by C-H...O and O-H—O hydrogen bonds.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Taylor and Francis Group. |
| Keywords: | Vitamin D3 Analogues; Crystal Structure; Cholestrol; Compounds; Steroids; Chair Conformation |
| ID Code: | 51566 |
| Deposited On: | 28 Jul 2011 14:31 |
| Last Modified: | 28 Jul 2011 14:31 |
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