Synthesis and X-ray crystal structure of a polymeric copper(II) complex containing the novel ligand 4,4′-(1,4-phenylene)bis[3-phenyl-5-(2-pyridyl)-4H-1,2,4-triazole]

The synthesis and X-ray crystal structure of the complex {[CuII(Ph2PBPT)(bpy)](ClO4)2 · 2DMF}∞ where Ph2PBPT=4,4′-(1,4-phenylene)bis[3-phenyl-5-(2-pyridyl)-4H-1,2,4-triazole], bpy=2,2′-bipyridine and DMF=N,N-dimethylformamide are reported. In this one-dimensional coordination polymer the Cu2+ ions are in a distorted octahedral N6 coordination environment made up of two Ph2PBPT molecules, each chelating via one pyridine and one triazole nitrogen, and one bpy co-ligand. Within the zig-zag chain thus formed the shortest distance between two metal centres across the Ph2PBPT ligand is 13.305(3) Å while it is 10.009(3) Å between two chains. This complex represents the first structurally characterised example of a coordination compound incorporating a chelating 4,4′-bis(4H-1,2,4-triazole) as a ligand.