Brito I, Bórquez J, Loyola LA, López-Rodríguez M, Cárdenas A. An orthorhombic polymorph of mulinic acid.
Acta Crystallogr Sect E Struct Rep Online 2010;
66:o331-2. [PMID:
21579761 PMCID:
PMC2979944 DOI:
10.1107/s1600536810000528]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2009] [Accepted: 01/05/2010] [Indexed: 11/24/2022]
Abstract
The title compound [systematic name: (3S,3aS,10bR)-3-isopropyl-5a,8-dimethyl-2,3,4,5,5a,6,7,10,10a,10b-decahydro-endo-epidioxycyclohepta[e]indene-3a(1H)-carboxylic acid], C20H30O4, is a polymorphic form of a previously reported structure [Loyola et al. (1990 ▶). Tetrahedron, 46, 5413–5420]. The newly found orthorhombic polymorph crystallizes in P212121 with two molecules in the asymmetric unit. The molecules are linked into discrete D(2) chains by simple O—H⋯O interactions. There are only slight variations in the molecular geometry and supramolecular organization in the crystal structures of the two polymorphs. The densities are 1.145 (monoclinic, P21) and 1.155 Mg m−3 (orthorhombic, P212121).
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