Send to

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

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

Author information

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


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.


acetic acid; coumarin; crystal structure; hydrogen bonding

Supplemental Content

Full text links

Icon for PubMed Central
Loading ...
Support Center