Abstract
The title compound, C21H18O2, crystallized in the centrosymmetric space group P21/n with one molecule in the asymmetric unit. There is a single hydrogen bond, with an Odonor⋯Oacceptor distance of 2.624 (2) Å, which forms a cyclic dimer about a center of symmetry. The carboxyl group O atoms are ordered, while the carboxyl-H atom is disordered. A single leading intermolecular C—H⋯O interaction has an H⋯O distance of 2.68 Å and a C—H⋯O angle of 178°; this interaction forms chains. Taken together with the hydrogen bond, it generates chains and rings. Structural comparisons are made with trans-cinnamic acid and with 4-methyl-trans-cinnamic acid.
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Schedule a callMore From: Acta crystallographica. Section C, Crystal structure communications
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