Acta Cryst. (2013). E69, o142-o143
[ doi:10.1107/S1600536812051239 ]

Cinnarizinium fumarate

C. N. Kavitha, S. O. Yildirim, J. P. Jasinski, H. S. Yathirajan and R. J. Butcher

Abstract: In the title salt {systematic name: 4-diphenylmethyl-1-[(E)-3-phenylprop-2-en-1-yl]piperazin-1-ium (2Z)-3-carboxyprop-2-enoate}, C₂₆H₂₉N₂⁺·C₄H₃O₄^-, the piperazine ring in the cation adopts a distorted chair conformation and contains a positively charged N atom with quaternary character. The dihedral angle between the mean planes of the phenyl rings of the diphenylmethyl group is 74.2 (7)° and those between these rings and the phenyl ring of the 3-phenylprop-2-en-1-yl group are 12.7 (9) and 80.6 (8)°. In the crystal, N-HO and O-HO hydrogen bonds form chains along [001]. Weak C-HO interactions connect parallel chains along [010], forming layers perpendicular to the a-axis direction.

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