Acta Crystallographica Section C

Crystal Structure Communications

Volume 59, Part 11 (November 2003)

na1617 scheme

Acta Cryst. (2003). C59, o634-o635 [doi:10.1107/S0108270103021413]

Two polymorphic forms of 2,5-bis(4-methoxycarbonylphenyl)-1,3,4-oxadiazole

G. Reck, I. Orgzall, B. Schulz and B. Dietzel

Abstract: The title compound [systematic name: dimethyl 4,4'-(1,3,4-oxadiazole-2,5-diyl)diphenylenedicarboxylate], C₁₈H₁₄N₂O₅, crystallizes under similar conditions in two different orthorhombic crystalline forms. In both forms, the molecule consists of two equivalent parts. In form 1, these parts are related by a twofold axis of space group Pbcn, and in form 2, by a mirror plane of space group Cmc2₁. The O atom of the oxadiazole ring occupies a special position on the twofold axis and on the mirror plane in forms 1 and 2, respectively.

Formula: C₁₈H₁₄N₂O₅

Online 22 October 2003


	Structure factor file (CIF format) (68.9 kbytes) Contains datablock I

	Structure factor file (CIF format) (68.1 kbytes) Contains datablock II

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