Synthesis and characterization of two new nickel(II) complexes with azide: Formation of a two-dimensional coordination polymer with 63-hcb topology

Two nickel(II) complexes, [Ni(deen)(N3)2]n (1) and [Ni(L)N3] (2), where deen = N,N-diethylethylenediamine, HL = 2-(1-(2-(diethylamino)ethylimino)ethyl)phenol, have been prepared and characterized by elemental analysis, IR and UV–Vis spectroscopy and single crystal X-ray diffraction studies. Complex 1 is polynuclear with alternating double end-on and end-to-end azide bridges, which creates 2D layer with 63-hcb topology. Complex 2 is mononuclear and contains square planar nickel(II). Complex 2 shows significant C–H⋯π interactions and forms a 1D array along with a dimeric unit in the crystal packing.

Two nickel(II) complexes have been prepared using azide and two different ligands. The structures and geometries of the two complexes are drastically different. Complex 1 is polynuclear having alternating double end-on and end-to-end azide bridges which creates 2D layer with 63-hcb topology whereas, complex 2 is mononuclear and contains square planar nickel(II).Figure optionsDownload as PowerPoint slide