Triaqua­(1,4,7-triaza­cyclo­nonane-κ(3) N (1),N (4),N (7))nickel(II) bromide nitrate

In the title half-sandwich compound, [Ni(C(6)H(15)N(3))(H(2)O)(3)]Br(NO(3)), the central Ni(II) ion, lying on a threefold rotation axis, is six-coordinated by three amine N atoms from the face-capping triaza macrocycle and three water O atoms in a slightly distorted octa­hedral geometry. In the crystal, O—H⋯O hydrogen bonding and weak O—H⋯Br inter­actions associate the Ni(II) cations and the counter-ions into a three-dimensional supra­molecular network.