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Abstract
The title compound, (C6H9N2)2[Co(C6H2N2O4)2(H2O)2]·8H2O, was obtained by the reaction of CoCl2·6H2O with 1,4-pyrazine-2,3-dicarboxylic acid and 2-amino-6-methylpyridine in aqueous solution (molar ratio 1:2:2). The CoII ion is situated on an inversion centre and is coordinated by two O and two N atoms of two symmetry-related 1,4-pyrazine-2,3-dicarboxylate ligands and two water molecules and has a disorted octahedral coordination environment. The asymmetric unit also contains four water molecules. In the crystal, extensive intermolecular classical N—H⋯O, O—H⋯O and O—H⋯N hydrogen bonds and π–π stacking interactions [centroid–centroid distance = 3.490 (1) Å] connect the various components, forming a three-dimensional network.
Highlights
The title compound, (C6H9N2)2[Co(C6H2N2O4)2(H2O)2]8H2O, was obtained by the reaction of CoCl26H2O with 1,4pyrazine-2,3-dicarboxylic acid and 2-amino-6-methylpyridine in aqueous solution
The CoII ion is situated on an inversion centre and is coordinated by two O and two N
For related structures based on 1,4-pyrazine-2,3-dicarboxylate ligands, see: Eshtiagh-Hosseini, Alfi et al (2010)
Summary
R factor = 0.030; wR factor = 0.087; data-to-parameter ratio = 11.1. The title compound, (C6H9N2)2[Co(C6H2N2O4)2(H2O)2]8H2O, was obtained by the reaction of CoCl26H2O with 1,4pyrazine-2,3-dicarboxylic acid and 2-amino-6-methylpyridine in aqueous solution (molar ratio 1:2:2). The CoII ion is situated on an inversion centre and is coordinated by two O and two N atoms of two symmetry-related 1,4-pyrazine-2,3-dicarboxylate ligands and two water molecules and has a disorted octahedral coordination environment. The asymmetric unit contains four water molecules. Extensive intermolecular classical N—H O, O—H O and O—H N hydrogen bonds and – stacking interactions [centroid–centroid distance = 3.490 (1) Å] connect the various components, forming a three-dimensional network
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