Acta Cryst. (2013). E69, m132
[ doi:10.1107/S1600536813002985 ]

4,4'-(Ethene-1,2-diyl)dipyridinium 4-[2-(pyridin-4-yl)ethenyl]pyridinium octacyanidomolybdate(V) tetrahydrate

X.-Z. Yang, A.-Y. Hu and A.-H. Yuan

Abstract: The crystal structure of the title compound, (C₁₂H₁₂N₂)(C₁₂H₁₁N₂)[Mo(CN)₈]·4H₂O, consists of 4,4'-(ethene-1,2-diyl)dipyridinium and 4-[2-(pyridin-4-yl)ethenyl]pyridinium cations disordered over the same site, an [Mo(CN)₈]^3- anion and four water molecules of crystallization. The eight-coordinate [Mo(CN)₈]^3- unit exhibits a slightly distorted square-antiprismatic geometry. In the structure, the cations (crystallographic symmetry, 2) and anions (crystallographic symmetry, 222) are arranged alternately by N-HO and O-HN hydrogen bonds, forming layers parallel to the bc plane. These layers are further linked through O-HN hydrogen bonds, generating a three-dimensional supramolecular network.

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