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

Acta Crystallographica Section E: Crystallographic Communications

Basanagouda, M.¹  Gowda, R.²  Gowda, K.V.A.³  Swamy, R.R.⁴ 

[1] Department of Chemistry, P.C. Jabin Science College, Hubli 580 031, 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 Physics, Sri Krishna Rajendra Silver Jubilee Institute of Technology, Bangalore 560 001, Karnataka, India

关键词: CRYSTAL STRUCTURE;    COUMARIN;    ACETIC ACID;    HYDROGEN BONDING;   

DOI  :  10.1107/S2056989015014103

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

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, mol­ecules 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 inter­actions lead to undulating (001) layers in the crystal.

【 授权许可】

CC BY