A. Abou, B. Sessouma, Abdoulaye Djandé
Jan 31, 2012
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Influential Citations
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Journal
Acta Crystallographica Section E: Structure Reports Online
Abstract
In the title molecule, C20H18O4, the three methyl groups of the tert-butyl substituent show rotational disorder. Each methyl group is split over three positions, with refined site-occupation factors of 0.711 (4), 0.146 (3) and 0.144 (4). The benzene ring of the benzoate group is oriented at a dihedral angle of 60.70 (7)° with respect to the planar chromene ring [maximum deviation = 0.046 (2) Å]. The crystal structure features centrosymmetric R 2 2(8) dimers formed via C—H⋯O interactions, and these dimeric aggregates are connected by C—H⋯π interactions.