Acta Crystallographica Section C

Crystal Structure Communications

Volume 62, Part 7 (July 2006)

organic compounds

ln3008 scheme

Acta Cryst. (2006). C62, o369-o371 [ doi:10.1107/S0108270106017422 ]

Two polymorphs of N,N'-diphenethylterephthalamide

J. Ossowski, P. Kus, C. Näther and P. G. Jones

Abstract: The title compound, C₂₄H₂₄N₂O₂, crystallizes as a triclinic polymorph from dimethylformamide and a monoclinic polymorph from ethanol. In both forms, the molecule displays crystallographic inversion symmetry, and the packing involves translationally related `ladders' of molecules connected by N-HO=C hydrogen bonds. Differences between the structures can be rationalized in terms of weak C-HO contacts. Powder and differential scanning calorimetry investigations of new samples gave no evidence for the triclinic form, and it seems to represent a disappearing polymorph.

Formula: C₂₄H₂₄N₂O₂


	Structure factor file (CIF format) (99.8 kbytes) [ doi:10.1107/S0108270106017422/ln3008Tsup2.hkl ] Contains datablock T

	Structure factor file (CIF format) (142.3 kbytes) [ doi:10.1107/S0108270106017422/ln3008Msup3.hkl ] Contains datablock M

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