Acta Crystallographica Section C

Crystal Structure Communications

Volume 63, Part 8 (August 2007)

organic compounds

fa3092 scheme

Acta Cryst. (2007). C63, o441-o444 [ doi:10.1107/S0108270107027497 ]

Hydrogen-bonded networks in trans-3-(3-pyridyl)acrylic acid and rctt-3,3'-(3,4-dicarboxycyclobutane-1,2-diyl)dipyridinium dichloride

A. Briceño, R. Atencio, R. Gil and A. Nobrega

Abstract: The structure of trans-3-(3-pyridyl)acrylic acid, C₈H₇NO₂, (I), possesses a two-dimensional hydrogen-bonded array of supramolecular ribbons assembled via heterodimeric synthons between the pyridine and carboxyl groups. This compound is photoreactive in the solid state as a result of close contacts between the double bonds of neighbouring molecules [3.821 (1) Å] along the a axis. The crystal structure of the photoproduct, rctt-3,3'-(3,4-dicarboxycyclobutane-1,2-diyl)dipyridinium dichloride, C₁₆H₁₆N₂O₄²⁺·2Cl^-, (II), consists of a three-dimensional hydrogen-bonded network built from crosslinking of helical chains integrated by self-assembly of dipyridinium cations and Cl^- anions via different O-HCl, C-HCl and N⁺-HCl hydrogen-bond interactions.

Formula: C₈H₇NO₂ and C₁₆H₁₆N₂O₄²⁺·2Cl^-


	Structure factor file (CIF format) (62.0 kbytes) [ doi:10.1107/S0108270107027497/fa3092Isup2.hkl ] Contains datablock I

	Structure factor file (CIF format) (162.4 kbytes) [ doi:10.1107/S0108270107027497/fa3092IIsup3.hkl ] Contains datablock II

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