Accession Number:

AD0763613

Title:

The Structure of a Ring-D-Bridged Steroid,

Descriptive Note:

Corporate Author:

NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF BIOLOGICAL SCIENCES

Personal Author(s):

Report Date:

1972-09-14

Pagination or Media Count:

7.0

Abstract:

14ALPHA,17ALPHA-Etheno-15,16-ditrifluoromethyl-4,15-pregnadiene-3,20-dione, C25H26O2F6, crystallizes in the orthorhombic space group. Intensity data were collected at room temperature with an automatic four-circle diffractometer. The structure was solved by direct methods and refined by the least-squares procedure to a final value of R0.061 for 2369 observed reflexions. The confirmation of ring A is intermediate between a half-chair and a sofa. Rings B and C, which are trans fused, are chair shaped. The geometry of the bicyclic system consisting of rings D and D is very similar to that or norbornadiene. Modified author abstract

Subject Categories:

  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE