Crystal structure of 7,8-benzocoumarin-4-acetic acid

R Ranga Swamy; Ramakrishna Gowda; K V Arjuna Gowda; Mahantesha Basanagouda

doi:10.1107/S2056989015014103

Crystal structure of 7,8-benzocoumarin-4-acetic acid

Acta Crystallogr E Crystallogr Commun. 2015 Jul 31;71(Pt 8):o617-8. doi: 10.1107/S2056989015014103. eCollection 2015 Aug 1.

Authors

R Ranga Swamy¹, Ramakrishna Gowda², K V Arjuna Gowda³, Mahantesha Basanagouda⁴

Affiliations

¹ Department of Physics, Sri Krishna Rajendra Silver Jubilee Institute of Technology, Bangalore 560 001, Karnataka, India.
² Department of Physics, Govt. College for Women, Kolar 563 101, Karnataka, India.
³ Department of Physics, Govt. College for Women, Mandya 571 401, India.
⁴ Department of Chemistry, P.C. Jabin Science College, Hubli 580 031, Karnataka, India.

Abstract

The fused-ring system in the title compound [systematic name: 2-(2-oxo-2H-benzo[h]chromen-4-yl)acetic acid], C15H10O4, is almost planar (r.m.s. deviation = 0.031 Å) and the Car-C-C=O (ar = aromatic) torsion angle for the side chain is -134.4 (3)°. In the crystal, mol-ecules are linked by O-H⋯O hydrogen bonds, generating [100] C(8) chains, where the acceptor atom is the exocyclic O atom of the fused-ring system. The packing is consolidated by a very weak C-H⋯O hydrogen bond to the same acceptor atom. Together, these inter-actions lead to undulating (001) layers in the crystal.

Keywords: acetic acid; coumarin; crystal structure; hydrogen bonding.