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

Kiran K Pujar; Manohar V Kulkarni; G N Anil Kumar

doi:10.1107/S1600536814021825

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

Acta Crystallogr Sect E Struct Rep Online. 2014 Oct 11;70(Pt 11):319-21. doi: 10.1107/S1600536814021825. eCollection 2014 Nov 1.

Authors

Kiran K Pujar¹, Manohar V Kulkarni¹, G N Anil Kumar²

Affiliations

¹ Department of Chemistry, Karnatak University, Dharwad 580 010, India.
² Department of Physics, M S Ramaiah Institute of Technology, MSRIT Post, Bangalore 560 054, India.

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

Keywords: bicoumarin; crystal structure; hydrogen bonds; π–π interactions.