Syntheses, crystal structures and magnetic property of two azido-bridged coordination polymers with 1,2-diaminocyclohexane as co-ligand

Two azido-bridged coordination polymers, [Ni(L)(μ1,1-N3)2] (1) and [Cu(L)(μ1,1,3-N3)(N3)] (2) (L = 1,2-diaminocyclohexane), have been synthesized and characterized by elemental analyses, IR spectra and X-ray structural analyses. Complex 1 is a one-dimensional helical chain coordination polymer with both azides as μ1,1-bridge, which exhibits interesting wheel motif. Complex 2 shows two-dimensional layer network in which an azide acts as μ1,1,3-bridge and the other azide as monodentate ligand. Cyclic voltammogram gives quasi-reversible redox wave of Cu(II)/Cu(I) pair. Variable-temperature magnetic property of 1 was investigated, which shown strong ferromagnetic interaction arising from the μ1,1-azido bridging nickel(II) chains.