Crystal structure and Hirshfeld surface analysis of (nitrato-κ²O,O′)(1,4,7,10-tetra­aza­cyclo­do­decane-κ4N)nickel(II) nitrate.

The crystal structure of the title compound, [Ni(C₈H₂₀N4)(NO₃)]NO₃, at room temperature, has monoclinic (P2₁/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-tetraazacyclododecane (cyclen) backbone has the [4,8] configuration, with three nitrogen-bound H atoms directed above the plane of the nitrogen atoms towards the offset nickel atom with the fourth nitrogen-bound hydrogen directed below from the plane of the nitrogen atoms. The nitrate anion O atoms are seen to hydrogen bond to the H atoms bound to the N atoms of the ligand. [ABSTRACT FROM AUTHOR]