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Acta Cryst. (2012). E68, m1516-m1517
[ doi:10.1107/S1600536812047034 ]

Bis([mu]-2-carboxymethyl-2-hydroxybutanedioato)bis[diaquamanganese(II)]-1,2-bis(pyridin-4-yl)ethene-water (1/1/2)

I. H. Hwang, P.-G. Kim, J.-C. Lee, C. Kim and Y. Kim

Abstract: The asymmetric unit of the title compound, [Mn2(C6H6O7)2(H2O)4]·C12H10N2·2H2O, contains half of the centrosymmetric Mn complex dimer, half of a 1,2-bis(pyridin-4-yl)ethene molecule, which lies across an inversion center, and one water molecule. Two citrate ligands bridge two MnII ions, and each MnII atom is coordinated by four O atoms from the citrate ligands (one from hydroxy and three from carboxylate groups) and two water O atoms, forming a distorted octahedral environment. In the crystal, O-H...O and O-H...N hydrogen bonds link the centrosymmetric dimers and lattice water molecules into a three-dimensional structure which is further stabilized by intermolecular [pi]-[pi] interactions [centroid-centroid distance = 3.959 (2) Å]. Weak C-H...O hydrogen bonding interactions are also observed.

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