Acta Crystallographica Section C

Crystal Structure Communications

Volume 60, Part 4 (April 2004)

fr1460 scheme

Acta Cryst. (2004). C60, o261-o262 [doi:10.1107/S0108270104003063]

2,4-Dimethoxybenzoic acid and 2,5-dimethoxybenzoic acid

D. H. Barich, M. T. Zell, D. R. Powell and E. J. Munson

Abstract: The title compounds (both C₉H₁₀O₄) have nearly planar structures, and the methyl and/or carboxylic acid groups lie out of the molecular plane, as dictated by steric interactions. 2,5-Dimethoxybenzoic acid (2,5-DMBA) forms an unusual intramolecular hydrogen bond between the carboxylic acid group and the O atom of the methoxy group in the 2-position [OO = 2.547 (2) Å and O-HO = 154 (3)°]. 2,4-DMBA forms a typical hydrogen-bond dimer with a neighboring molecule.

Formula: C₉H₁₀O₄

Online 20 March 2004


	Structure factor file (CIF format) (77.0 kbytes) Contains datablock I

	Structure factor file (CIF format) (80.5 kbytes) Contains datablock II

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