Bis[tris(propane-1,3-diamine-k2N,N′)-nickel(II)] diaquabis(propane-1,3-diamine-k2N,N′)nickel(II) hexabromide dihydrate

Abstract

In the title compound, [Ni(C3H10N2) 3]2[Ni(C3H10N2) 2(H2O)2]- Br6· 2H2O, one Ni2+ cation, located on an inversion centre, is coordinated by four N atoms from two ligands and by two water O atoms. The other Ni2+ cation, located in a general position, is coordinated by six N atoms from three ligands. In both cases, the Ni 2+ cation has an octahedral coordination environment. The overall structural cohesion is ensured by three types of hydrogen bonds, N-H⋯Br, O-H⋯Br and O-H⋯O, which connect the two types of complex cations, the bromide counter-anions and the lattice water molecules into a three-dimensional network.