Bis(2,2′-bipyridine-κ(2) N,N′)(4-methyl­benzoato-κ(2) O,O′)copper(II) iodide hemihydrate

The title compound, [Cu(C(8)H(7)O(2))(C(10)H(8)N(2))(2)]I·0.5H(2)O, was obtained by the hydro­thermal reaction of copper(I) iodide, 4-methyl­benzoic acid and 2,2′-bipyridine. The initial reactant of Cu(I) was oxidized to Cu(II). The asymmetric unit contains two independent complex mol­ecules, two I(−) ions and one water molecule. Each Cu(II) atom is coordinated by two O atoms from a 4-methyl­benzoate ligand and four N atoms from two 2,2′-bipyridine ligands, displaying a distorted octa­hedral geometry. The structure involves O—H⋯I hydrogen bonds between the water mol­ecule and iodide ions and π–π stacking inter­actions between the benzene and pyridyl rings [centroid–centroid distance = 3.79 (1) Å] and between the pyridyl rings [centroid–centroid distance = 3.87 (1) Å].