Acta Cryst. (2006). E62, m2613-m2615  [ doi:10.1107/S1600536806036609 ]

Tetrakis{trans-4-[(N,N-diethylamino)styryl]-1-methylpyridinium} dodecatungstosilicate tetradecahydrate

X.-J. Tan, D.-X. Xing and Y. Liu

Abstract: In the title compound, (C₁₈H₂₃N₂)₄[SiW₁₂O₄₀]·14H₂O, the asymmetric unit contains two trans-4-[(N,N-diethylamino)styryl]-N-methylpyridinium (DEASP) cations, one half dodecatungstosilicate (SiW₁₂O₄₀) anion and seven water molecules. The two DEASP cations form a periodically layered arrangement perpendicular to their molecular planes and the SiW₁₂O₄₀ anions have a disordered `pseudo-Keggin' structure around an inversion centre. They are linked into an infinite three-dimensional assembly via electrostatic forces and C-HO hydrogen bonds.

Online 15 September 2006

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