Crystal structure of catena -poly[[[tetra-aqua-iron(II)]- trans -μ-1,2-bis-(pyridin-4-yl)ethene-κ 2 N : N '] bis-( p -toluene-sulfonate) methanol disolvate].

In the title polymeric complex, {[Fe(C12 H10 N2 )2 (H2 O)4 ](CH3 C6 H4 SO3 )2 ·2CH3 OH} n , the FeII cation, located on an inversion centre, is coordinated by four water mol-ecules in the equatorial positions and two 1,2-bis-(pyridin-4-yl)ethene mol-ecules in the axial positions. This results in a distorted octa-hedral geometry for the [N2 O4 ] coordination polyhedron. The 1,2-bis-(pyridin-4-yl)ethene mol-ecules bridge the FeII cations, forming polymeric chains running along the a- axis direction. Stabilization of the crystal structure is provided by O-H⋯O hydrogen bonds; these are formed by coordinated water mol-ecules as donors towards the O atoms of the methanol mol-ecules and tosyl-ate anions as acceptors of protons, leading to the formation of a three-dimensional supra-molecular network. Weak C-H⋯O hydrogen bonds are also observed in the crystal.