Crystal structure and Hirshfeld surface analysis of (nitrato-κ(2) O,O')(1,4,7,10-tetra-aza-cyclo-dodecane-κ(4) N)nickel(II) nitrate.

The crystal structure of the title compound, [Ni(C(8)H(20)N(4))(NO(3))]NO(3), at room temperature, has monoclinic (P2(1)/n) symmetry. The structure displays inter-molecular hydrogen bonding. The nickel displays a distorted bipyramidal geometry with the symmetric bidentate bonded nitrate occupying an equatorial site. The 1,4,7,10-tetra-aza-cyclo-dodecane (cyclen) backbone has the [4,8] configuration, with three nitro-gen-bound H atoms directed above the plane of the nitro-gen atoms towards the offset nickel atom with the fourth nitro-gen-bound hydrogen directed below from the plane of the nitro-gen atoms. The nitrate anion O atoms are seen to hydrogen bond to the H atoms bound to the N atoms of the ligand.