C. Kennard, G. Smith, G. Katekar
1982
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Influential Citations
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Journal
Australian Journal of Chemistry
Abstract
The crystal structure of 2-(2,6-dichlorophenylcarbamoyl)benzoic acid has been determined by direct methods from three-dimensional X-ray diffraction data and refined to R 0.076 for 971 'observed' reflections. Crystals are monoclinic, space group P21/c with Z4 in a cell of dimensions a 12.150(6), b l3.629(6), c 8.368(4) A, β lO3.75(4)o. The molecules form centrosymmetric hydrogen-bonded cyclic dimers [O. . .O, 2.64(1) A] with the carboxylic acid group lying in the approximate plane of the attached benzene ring (dihedral angle 7.63o). This is in turn almost parallel to the 2,6-dichlorophenyl substituent group on the acid amide (dihedral angle 4.14o). The amide group is synclinally related to the ring systems in a similar way to that found in other phthalamic acids.