Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Crystal Structure of Cholesteryl Methyl Ether

  • Yun, Mi-Kyung (Department of Chemistry, Sook Myung Women's University) ;
  • Park, Young-Ja (Department of Chemistry, Sook Myung Women's University) ;
  • Shin, Whan-Chul (Department of Chemistry, College of Natural Scineces, Seoul National University) ;
  • Craven, B. M. (Department of Ctrystallography, University of Pittsburgh)
  • Published : 1989.08.20
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Abstract

Cholesteryl methyl ether$(CH_3OC_{27}H_{45})$ crystallizes in the monoclinic space group $P2_1$with a = 11.740 (8), b = 7.576 (5), c = 15.492 (10)${\AA},\; {\beta}\;= 110.39 (5)^{\circ}$, Z = 2, Dc = 1.03 g/$cm^3$ and Do = 0.96 g/$cm^3$. The intensities were collected on a Nonius CAD-4 diffractometer with Nb-filtered Mo-$K_{\alpha}$ radiation. The structure was solved by direct methods and refined by full matrix least-squares methods. The final R factor was 0.085 for 1479 observed reflections. Compared with other cholesterol derivatives, the cholesteryl ring and tail region of the molecule are normal. The molecular long axes are parallel to the [101] axis and molecules are packed together in a similar way to those in cholesteryl cliloride and bromide.

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References

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