Two 1:1 mixed ligand complexes of copper(II) azide with substituted pyridines, namely di-μ(1,1)- azido-bis[azido(2-benzoylpyridine)]dicopper(II) ( 1) and catena-di-μ(1,3)-azido-[di-μ(1,1)-azido-bis(ethyl nicotinate)dicopper(II)] ( 2), have been synthesized and characterized by X-ray crystallography. Crystal data: 1, C 24H 18N 14Cu 2O 2:, space group P 1 , a = 7.471(2), b=10.477(3), c=9.389(3) Å, α = 100.77(2), β = 109.83(2), γ=82.21(2)°, Z=1, and R F=0.036 for 2035 observed Mo Kα data; 2, C 8H 9-N 7CuO 2, space group P2 1/ c, a=9.961(2), b = 5.306(1), c=22.621(4) Å, β=96.81(2)°, Z=4, and R F=0.044 for 869 observed Mo Kα data. In the centrosymmetric binuclear molecule 1, the Cu(II) atom has distorted square pyramidal coordination geometry involving a bidentate 2-Bzpy ligand, with each μ(1,1) bridging N atom serving simultaneously as a basal ligand to one metal atom and as a distal axial ligand to the other. The polymeric complex 2 features monodentate Et-nic ligands, centrosymmetric di-μ(1,1) azido bridged Cu 2N 2 rings, distorted square pyramidal Cu(II) coordination geometry, and di-μ(1,3) azido bridges which link the centrosymmetric binuclear Cu 2(Et-nic) 2(N 3) 2 moieties into infinite chains parallel to the b axis.