科研之友
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摘要
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], C(20)H(30)O(4), is a polymorphic form of a previously reported structure [Loyola et al. (1990). Tetrahedron, 46, 5413-5420]. The newly found orthorhombic polymorph crystallizes in P2(1)2(1)2(1) with two molecules in the asymmetric unit. The molecules are linked into discrete D(2) chains by simple O-H center dot center dot center dot 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, P2(1)) and 1.155 Mg m(-3) (orthorhombic, P2(1)2(1)2(1)).
- 出版日期2010-2
