Sooksimuang T, Kamtonwong S, Parnchan W, Kangkaew L, Sahasithiwat S. Crystal structure of 3,13-dimethoxy-5,6,10,11-tetrahydrofuro[3,4-i][5]helicene-7,9-dione.
Acta Crystallogr Sect E Struct Rep Online 2014;
70:418-20. [PMID:
25484762 PMCID:
PMC4257283 DOI:
10.1107/s1600536814023137]
[Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Accepted: 10/21/2014] [Indexed: 11/16/2022]
Abstract
In the crystal, the molecules form a layered structure parallel to (10) via C—H⋯O hydrogen-bonding interactions. Adjacent layers are also linked by C—H⋯O hydrogen bonds, forming a three-dimensional structure.
The title compound, C26H20O5, crystallizes with two independent molecules (A and B) in the asymmetric unit, which differ primarily in the location of the –OCH3 groups. In the crystal, the molecules form a layered structure parallel to (10-1) by C—H⋯O hydrogen-bonded networks. Adjacent layers are also linked by further C—H⋯O hydrogen bonds, forming a three-dimensional structure.
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