Bis(2-formyl­pyridine semicabazonato)­nickel(II)

The Ni atom in the title complex, [Ni(C₇H₇N₄O)₂], is octahedrally coordinated by two mono-deprotonated Schiff bases that are derived from the condensation of pyridine-2-carb­aldehyde and semicarbazide; the Schiff bases act as meridional tridentate ligands, each of them coordinating the metal with the deprotonated amidate oxy­gen [Ni—O = 2.0909 (15) and 2.0959 (15) Å], imine nitro­gen [Ni—N = 1.9892 (18) and 1.9822 (18) Å] and pyridine nitro­gen [Ni—N = 2.100 (2) and 2.1317 (2) Å]. The dihedral angle formed by the mean planes of the bicyclic chelate systems of each of the ligands is equal to 87.69 (4)°. The crystal packing is stabilized by intermolecular hydrogen bonds involving N—H⋯O and C—H⋯O interactions.