Bis(3-amino-pyrazine-2-carboxyl-ato-κ(2)N(1),O)diaqua-cobalt(II).

Acta crystallographica. Section E, Structure reports online(2013)

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Abstract
In the title compound, [Co(C(5)H(4)N(3)O(2))(2)(H(2)O)(2)], the Co(II) atom is situated on a twofold rotation axis and is N,O-chelated by two 3-amino-pyrazine-2-carboxyl-ate anions and additionally bonded to the O atoms of two water mol-ecules, leading to a slightly distorted octa-hedral coordination environment. The crystal packing is dominated by inter-molecular O-H⋯O, O-H⋯N and N-H⋯O hydrogen bonding involving the water mol-ecules and amino groups as donors and carboxyl-ate O atoms, as well as the non-coordinating heterocyclic N atoms as acceptors, resulting in a three-dimensional network. An intra-molecular N-H⋯O hydrogen bond is also observed.
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bis3-aminopyrazine-2-carboxylato-κ<sup>2</sup><i>n</i><sup>1</sup><i>o</i>diaquacobaltii
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