Crystal structure of 6,6′-dimethyl-2H,2′H-3,4′-bichromene-2,2′-dione
نویسندگان
چکیده
In the title compound, C20H14O4, the dihedral angle between the two coumarin ring systems is 52.37 (19)°, showing a gauche arrangement across the C-C bond which links the two units. The carbonyl groups of the two coumarin units adopt an s-trans arrangement. In the crystal, pairs of C-H⋯O hydrogen bonds and π-π inter-actions [centroid-centroid distance = 3.631 (2) Å] connect the mol-ecules into inversion dimers.
منابع مشابه
7,7′-Dihydroxy-4,4′-dimethyl-3,4-dihydro-2H,2′H-4,6′-bichromene-2,2′-dione
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عنوان ژورنال:
دوره 70 شماره
صفحات -
تاریخ انتشار 2014