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Crystal structure of 6,6'-dimethyl-2H,2'H-3,4'-bichromene-2,2'-dione.

ABSTRACT: 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 ?-? inter-actions [centroid-centroid distance = 3.631?(2)?Å] connect the mol-ecules into inversion dimers.

SUBMITTER: Pujar KK

PROVIDER: S-EPMC4257244 | biostudies-literature | 2014 Nov

REPOSITORIES: biostudies-literature

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Crystal structure of 6,6'-dimethyl-2H,2'H-3,4'-bichromene-2,2'-dione.

Pujar Kiran K KK Kulkarni Manohar V MV Anil Kumar G N GN

Acta crystallographica. Section E, Structure reports online 20141011 Pt 11

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. ...[more]

PMID: 25484733

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