Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 7 (July 2013)

metal-organic compounds

Acta Cryst. (2013). E69, m420-m421    [ doi:10.1107/S1600536813017340 ]

trans-Di­aqua­bis­(pyridazine-3-carboxyl­ato-[kappa]2N2,O)cobalt(II) dihydrate

B. Artetxe, S. Reinoso, L. San Felices, J. Martín-Caballero and J. M. Gutiérrez-Zorrilla

Abstract: The title compound, [Co(C5H3N2O2)2(H2O)2]·2H2O, contains a CoII ion on an inversion center, exhibiting an octa­hedral coordination geometry. The equatorial plane is formed by two trans-related N,O-bidentate pyridazine-3-carboxyl­ate ligands and the axial positions are occupied by two water mol­ecules. The CoII complex mol­ecules are stacked in a column along the a-axis direction by an O-H...N hydrogen bond between the non-coordinating pyridazine N atom and the coordinating water mol­ecule. These columns are further connected into a layer parallel to the ac plane by additional hydrogen bonds involving the coordinating and non-coordinating water mol­ecules, and the non-coordinating carboxyl­ate O atom. The crystal packing is completed by inter­layer weak C-H...O inter­actions.

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