Acta Crystallographica, Section C: Crystal Structure Communications 1996-09-15

Biphenyl-3-carboxylic acid at 296 and 203 K.

A C Blackburn, A J Dobson, R E Gerkin

Index: Acta Crystallogr. C 52 ( Pt 9) , 2320-3, (1996)

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Abstract

In biphenyl-3-carboxylic acid, C13H10O2, hydrogen bonding is of the cyclic-dimer type about a center of symmetry. The carboxyl H atom is ordered. The dihedral angle between the planar phenyl rings is 31.78(8) degrees at 296 K and 31.27(6) degrees at 203 K. The data show that the larger-than-average magnitudes of the displacement parameters of the carboxylic O atoms are due to thermal motion rather than static disorder.