Acta Cryst. (2013). E69, m129-m130
[ doi:10.1107/S1600536813002183 ]

Bis(3-aminopyrazine-2-carboxylato-²N¹,O)diaquacobalt(II)

R. Bouchene, S. Bouacida, F. Berrah, R. Belhouas and H. Merazig

Abstract: In the title compound, [Co(C₅H₄N₃O₂)₂(H₂O)₂], the Co^II atom is situated on a twofold rotation axis and is N,O-chelated by two 3-aminopyrazine-2-carboxylate anions and additionally bonded to the O atoms of two water molecules, leading to a slightly distorted octahedral coordination environment. The crystal packing is dominated by intermolecular O-HO, O-HN and N-HO hydrogen bonding involving the water molecules and amino groups as donors and carboxylate O atoms, as well as the non-coordinating heterocyclic N atoms as acceptors, resulting in a three-dimensional network. An intramolecular N-HO hydrogen bond is also observed.

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