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 Ni2+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.
Yangui, A., Rekik, W., Elleuch, S., & Abid, Y. (2014). Bis[tris(propane-1,3-diamine-k2N,N′)-nickel(II)] diaquabis(propane-1,3-diamine-k2N,N′)nickel(II) hexabromide dihydrate. Acta Crystallographica Section E: Structure Reports Online, 70(6). https://doi.org/10.1107/S1600536814011052