Acta Crystallographica, Section C: Crystal Structure Communications 1998-12-15

Quinoline-4-carboxylic acid.

A J Dobson, R E Gerkin

Index: Acta Crystallogr. C 54 ( Pt 12) , 1883-5, (1998)

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Abstract

The title acid, C10H7NO2, crystallized in the centrosymmetric space group P2(1)/c with one molecule in the asymmetric unit. There is a single hydrogen bond. O-H...N, with a donor-acceptor distance of 2.596 (1) A. The carboxylic H atom is ordered. The dihedral angle between the best-fit quinoline core plane and the carboxyl plane is 45.9 (1) degrees. Structural comparisons are made with the closely related molecule 2-phenylquinoline-4-carboxylic acid.