Acta Cryst. (2002). E58, o1267-o1268  [ doi:10.1107/S1600536802018640 ]

4-Dimethylaminopyridinium-1-squarate

T. Kolev, D. Yancheva, M. Schürmann, D.-C. Kleb, H. Preut and M. Spiteller

Abstract: The crystal structure of the title compound, alternatively known as 4-dimethylaminopyridinium-betaine of squaric acid or 4-dimethylaminopyridiniumtrioxocyclobutylide, C₁₁H₁₀N₂O₃, contains a half molecule in the asymmetric unit. The nearly planar molecule [maximum deviation from planarity 0.077  (2)  Å] is perpendicular to a mirror plane.

Online 25 October 2002

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