Acta Cryst. (2006). E62, m2050-m2051  [ doi:10.1107/S1600536806028613 ]

A three-dimensional polymeric mixed-valence copper complex: poly[tri--azido--di-2-pyridyldiazene-dicopper(I,II)]

M.-M. Yu, H.-Z. Kou, Z.-H. Ni, C.-H. Ge and A.-L. Cui

Abstract: The title complex, [Cu₂(N₃)₃(C₁₀H₈N₄)]_n, shows a three-dimensional poylmeric structure. Each Cu atom is surrounded by five N atoms from three bridging azide ligands and one di-2-pyridyldiazene ligand [Cu-N = 2.002 (5), 2.317 (6), 2.020 (4), 1.995 (5) and 1.985 (3) Å], forming a CuN₅ trigonal bipyramid. One _1,1-azide bridges two Cu atoms and the other two _1,1-azides bridge pairs of Cu atoms, forming a -Cu-N-Cu-N₂- chain. The di-2-pyridyldiazene bridges two Cu atoms of different -Cu-N-Cu-N₂- chains, forming a three-dimensional polymeric structure. On the basis of charge equilibrium, the presence of one Cu^II and one Cu^I ion are deduced and the two ions are disordered because of the occurrence of only one unique Cu atom in the structure.

Online 4 August 2006

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