Acta Crystallographica Section C

Crystal Structure Communications

Volume 59, Part 8 (August 2003)

Acta Cryst. (2003). C59, o435-o438 [doi:10.1107/S0108270103013362]

cis,cis,cis-1,2,4,5-Cyclohexanetetracarboxylic acid and its dianhydride

A. Uchida, M. Hasegawa and H. Manami

Abstract: cis,cis,cis-1,2,4,5-Cyclohexanetetracarboxylic acid, C₁₀H₁₂O₈, (I), contains a mirror plane and the cyclohexane ring exhibits a chair conformation. Two crystallographically independent hydrogen bonds form R₂²(14), R₂²(16) and R₄⁴(16) ring motifs, and propagation of these two hydrogen bonds along the c and b axes generates C₂²(16) and C₂²(7) chains. cis,cis,cis-1,2:4,5-Cyclohexanetetracarboxylic dianhydride, C₁₀H₈O₆, (II), was prepared by the reaction of (I) with acetic anhydride. The cyclohexane ring of (II) exhibits a boat conformation and the dihedral angle between the two anhydro rings is 117.5 (1)°.

Formula: C₁₀H₁₂O₈ and C₁₀H₈O₆

Online 12 July 2003


	Structure factor file (CIF format) (58.8 kbytes) Contains datablock I

	Structure factor file (CIF format) (53.2 kbytes) Contains datablock II

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