Acta Cryst. (2007). E63, m1331-m1332  [ doi:10.1107/S1600536807015851 ]

Bis(2-aminopyridinium) diaquabis(malonato-²O,O')cuprate(II)

S. R. Choudhury, J. Bhattacharyya, S. Das, B. Dey, S. Mukhopadhyay, L.-P. Lu and M.-L. Zhu

Abstract: The Cu^II ion in the title compound, (C₅H₇N₂)₂[Cu(C₃H₂O₄)₂(H₂O)₂], is located on an inversion centre and coordinated by four O atoms from two bidentate malonate (mal) ligands in the equatorial plane and two O atoms from two coordinated water molecules in the axial positions, forming an elongated octahedral geometry. Each [Cu(mal)₂(H₂O)₂]^2- anion bridges two 2-aminopyridinium cations via N-HO hydrogen bonds and symmetry-related anions via O-HO hydrogen bonds, to form an infinite one-dimensional chain. Additional O-HO and C-HO hydrogen bonds generate two-dimensional sheets that are joined into a three-dimensional network via N-HO, C-HO and interlayer - interactions between aminopyridinium cations (symmetry code: ).

Online 18 April 2007

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