Aqua(4-bromobenzoato-κO)bis(1,10-phenanthroline-κ2N,N′)zinc(II) 4-bromobenzoate 1.5-hydrate

In the title compound, [Zn(C7H4BrO2)(C12H8N2)(2)(H2O)](C7H4BrO2)center dot 1.5H(2)O, the Zn-II atom is coordinated by four N atoms from two chelating 1,10-phenanthroline (phen) ligands, one O atom from a 4-bromobenzoate ligand and one water molecule, completing a distorted ZnN4O2 octahedral geometry. The two phen ligands exhibit nearly perfect coplanarity (r.m.s. deviations = 0.027 and 0.031 angstrom), making a dihedral angle of 85.7 (1)degrees. The mean interplanar distances of 3.36 (2) and 3.41 (3) angstrom between adjacent phen ligands indicate pi-pi stacking interactions. The uncoordinated water molecules are partly occupied. One carboxylate O atom and two Br atoms are each disordered over two sites, with occupancy factors of 0.60 and 0.40. In the crystal structure, O-H center dot center dot center dot O and C-H center dot center dot center dot O hydrogen bonds and pi-pi stacking interactions link the complex cations, uncoordinated 4-bromobenzoate anions and water molecules into a three-dimensional supra-molecular network. An intramolecular O-H center dot center dot center dot center dot O hydrogen bond is observed in the cation.