The title compound crystallizes in space group P212121 with lattice constants a=16.253(3), b=17.107(3), and c=8.486(2) Å. The A ring has 1 α,2 β-half-chair conformation. The calculated steric energy of a 6 α-methyl-17 α-ester progesterone molecule is lower by about 4 kJ/mol for the normal A-ring conformation. The progesterone side chain has typical conformation for 17 α-ester steroids; the C(16)-C(17)-C(20)-O(20) torsion angle is -24.9(4)°.
|Original language||English (US)|
|Number of pages||4|
|Journal||Journal of Crystallographic and Spectroscopic Research|
|State||Published - Oct 1 1991|
ASJC Scopus subject areas
- Structural Biology
- Condensed Matter Physics