Acta Crystallographica Section C

Volume 65, Part 7 (July 2009)

organic compounds

sk3318 scheme

Acta Cryst. (2009). C65, o339-o341 [ doi:10.1107/S0108270109021490 ]

Hydrogen-bonded network in the trichloroacetate salts of 2-amino-5-chloropyridinium and 2-methyl-5-nitroanilinium monohydrate

J. Janczak and G. J. Perpétuo

Abstract: In the crystal structures of 2-amino-5-chloropyridinium trichloroacetate, C₅H₆ClN₂⁺·C₂Cl₃O₂^-, (I), and 2-methyl-5-nitroanilinium trichloroacetate monohydrate, C₇H₉N₂O₂⁺·C₂Cl₃O₂^-·H₂O, (II), the protonated planar 2-amino-5-chloropyridinium [in (I)] and 2-methyl-5-nitroanilinium [in (II)] cations interact with the oppositely charged trichloroacetate anions to form hydrogen-bonded one-dimensional chains in (I) and, together with water molecules, a three-dimensional network in (II). The crystals of (I) exhibit nonlinear optical properties. The second harmonic generation efficiency in relation to potassium dihydrogen phosphate is 0.77. This work demonstrates the usefulness of trichloroacetic acid in crystal engineering for obtaining new materials for nonlinear optics.

Formula: C₅H₆ClN₂⁺·C₂Cl₃O₂^- and C₇H₉N₂O₂⁺·C₂Cl₃O₂^-·H₂O


	Structure factor file (CIF format) (132.5 kbytes) [ doi:10.1107/S0108270109021490/sk3318Isup2.hkl ] Contains datablock I

	Structure factor file (CIF format) (162.1 kbytes) [ doi:10.1107/S0108270109021490/sk3318IIsup3.hkl ] Contains datablock II

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