title: (+)-3-oxo-4-pregnene-20beta-carboxylic acid: catemeric hydrogen bonding in a steroidal keto acid.
abstract: The title keto acid, (+)-23,24-dinor-3-oxochol-4-en-22-oic acid, C(22)H(32)O(3), forms carboxyl-to-ketone hydrogen-bonding catemers [O...O = 2.699 (4) A and O-H...O = 173 degrees ], linking molecules screw-related in b. The four molecules in the cell form two parallel counter-directional chains, screw-related in a. Intermolecular C-H...O=C close contacts to different neighboring molecules were found for the ketone and the acid.
authors.affiliation: Carl A. Olson Memorial Laboratories, Department of Chemistry, Rutgers University, Newark, NJ 07102, USA.
authors.forename: Hugh W
authors.initials: HW
authors.lastname: Thompson
authors.forename: Roger A
authors.initials: RA
authors.lastname: Lalancette
mesh_terms: D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D007651:Keto Acids / Q000737:chemistry*; D008958:Models, Molecular; D011283:Pregnenes / Q000737:chemistry*; D013256:Steroids / Q000737:chemistry*
chemical_list: C450019:3-oxo-4-pregnene-20-carboxylic acid; D007651:Keto Acids; D011283:Pregnenes; D013256:Steroids