Acta Cryst. (2004). E60, o1054-o1056  [ doi:10.1107/S1600536804011869 ]

trans-4-[p-(N,N-Diethylamino)styryl]-N-methylpyridinium triiodide

X.-J. Tan, S.-X. Sun, W.-T. Yu, D.-X. Xing, Y.-G. Wang and C.-G. Qi

Abstract: The title compound, C₁₈H₂₃N₂⁺·I₃^-, was obtained from the reaction of trans-4-[p-(N,N-diethylamino)styryl]-N-methylpyridinium iodide (DEASPI) and 12-tungstophosphate (H₃PW₁₂O₄₀) in ethanol. The compound contains the highly -conjugated cation C₁₈H₂₃N₂⁺, in which the pyridyl ring makes a dihedral angle of 4.14 (3)° with the benzene ring. The I₃^- counter-ion is roughly linear [I-I-I = 177.50 (2)°] and the I-I distances are 2.9478 (8) and 2.8849 (8) Å. Adjacent I₃^- anions are connected into I₆^2- dimers via an II contact of 3.852 (8) Å, much shorter than the sum of the van der Waals radii of 4.30 Å.

Online 22 May 2004

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