Comparative crystallographic and hydrogen-bonding analysis of cholestane derivatives.
A crystallographic comparison of some geometrical and structural features for a series of steroids (cholestane derivatives) is made in the present paper. Selected bond distances and bond angles of interest are discussed in detail. Conformations of individual ring systems in a series of 28 cholestane derivatives are calculated and discussed. Graphical presentations of ring conformations are made for all the five- and six-membered rings to show the frequency of their occurrence. X--H...A intra- and intermolecular interactions in the identified molecules are discussed with the standard distance and angle cut-off criteria. Distance-angle scatter plots for both kinds of interactions are presented for better understanding of packing interactions existing in cholestane molecules.
Condensed Matter Physics Group, Post-Graduate Department of Physics, University of Jammu, Jammu Tawi-180006, India. rkantverma@rediffmail.com
Rajnikant
Dinesh
Chand
C
Bhavnaish
D002776:Cholestanes / Q000737:chemistry*; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008968:Molecular Conformation
D002776:Cholestanes