Bis(2,2′-bipyridine)nitratocopper(II) nitrate

The title complex, [Cu(C10H8N2)(2)(NO3)]NO3, is the first reported unsolvated [Cu(bipy)(2)(NO3)]NO3 structure (bipy is 2,2'-bipyridine). The Cu-II atom of the [Cu(bipy)(2)(NO3)](+) complex is six-coordinated, forming a distorted octahedral geometry; bond lengths to the N atoms of the pyridine rings and one of the O atoms of the chelating NO3 ligand lie in the range 1.975 (5)-2.139 (6) Angstrom, with the second O atom from the NO3 ligand less tightly coordinated at a distance of 2.520 (6) Angstrom. The geometry of the CuN2N'2OO' chromophore more closely resembles that of [Cu(bipy)(2)(NO2)](+) complexes than previously reported [Cu(bipy)(2)(NO3)](+) structures.