Bis(dihydrogen phosphato-O)[(1SR,4SR,-8RS,11RS)-1,4,8,11-tetraazacyclotetradecane-kappa N-4]nickel(II)

The Ni-II ion in the title compound. [Ni(H2PO4)(2-)(C10H24N4)] is six-coord inate in a distorted square bipyramidal environment. The crystal structure consists of two molecules of the title compound, each residing on a centre of inversion. Four tetramine N atoms of the macrocyclic ligand! are equator ial [average Ni-N distance = 2.07(1)Angstrom] and two O atoms, one from eac h dihydrogen phosphate ion, are axial [average Ni-O distance = 2.12(3)Angst rom]. The structure of the title complex consists of a three-dimensional fr amework? which delimits intersecting a-axis, b-axis and c-axis tunnels. Two types of hydrogen bonds, O-H ... O and N-H ... O, ensure the cohesion and stability of the molecular packing.