The structure of the title compound, [Ni(C20H24N6)(NO3)](NO3), consist
s of a distorted octahedral nickel complex with the central Ni atom co
ordinated to two N atoms of the benzimidazole moieties, two ethylenedi
amine N atoms and two O atoms of one of the nitrate ions; the other ni
trate ion lies in a well defined position in the lattice and plays an
important role in crystal packing. The dihedral angle between the two
benzimidazole rings is 85.1(1)degrees. The crystal structure is stabil
ized by a three-dimensional network of N-H ... O and C-H ... O interac
tions, and N-H ... O intermolecular hydrogen bonds.