Corrections to Nomenclature of Phosphorus-Containing Compounds of Biochemical Importance |
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Authors: | B.M. Craven N.G. Guerina |
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Affiliation: | Crystallography Department, University of Pittsburgh, Pittsburgh, PA 15260 U.S.A. |
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Abstract: | Crystals of cholesteryl oleate (C45H78O2) are monoclinic, space group P21, with and have 2 molecules in the unit cell. The crystal structure has been determined by Patterson and Fourier methods at a resolution , using 799 X-ray intensities (CuKα) measured by a diffractometer. Structure refinement by block-diagonal least squares gave R = 0.12. The oleate chains are almost straight except for a kink at the cis-double bond. The chains pack side by side but without a regular sub-cell structure, in a manner which might be similar to the arrangement within biological membranes. As in cholesteryl octanoate, the cholesteryl ring systems pack together with extensive overlap of anti-parallel nearest neighbours. Projecting methyl groups interlock. |
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