Diaquabis(pyrazine-2-carboxamide-κ2N1,O)cobalt(II) dinitrate

Abstract

The asymmetric unit of the title complex, [Co(C5H5N3O)2(H2O)2](NO3)2, contains one half of a CoII cationic unit and a nitrate anion. The entire [Co(C5H5N3O)2(H2O)2]2+ cationic unit is completed by the application of inversion symmetry at the CoII site, generating a six-coordinate distorted octahedral environment for the metal ion. The chelating pyrazine-2-carboxamide molecules are bound to cobalt via N and O atoms, forming a square plane, while the remaining two trans positions in the octahedron are occupied by two coordinated water molecules.