Acta Cryst. (2005). E61, m11-m14  [ doi:10.1107/S1600536804030788 ]

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

K. Marjani, S. C. Davies, M. C. Durrant, D. L. Hughes, N. Khodamorad and A. Samodi

Abstract: 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)  Å, with the second O atom from the NO₃ ligand less tightly coordinated at a distance of 2.520  (6)  Å. 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.

Online 4 December 2004

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