A novel α-Po interpenetrating network with pseudo-double-wall pcu lattices based on the homoleptic nickel(II) node

A novel coordination polymer, {[Ni(bib)3](ClO4)2}∞ (1), was synthesized by the reaction of Ni(ClO4)2·6H2O with a linear rigid ligand 1,4-bis(imidazol-1-yl)benzene (bib). In this complex, the homoleptic octahedral nickel(II) node is connected by the rod-like spacer bib into an α-Po framework with larger pcu lattices, which are seemingly surrounded by double walls. The void space provided by the square-shaped channel is filled with another equivalent framework, i.e. complex 1 representing a unique interpenetrating α-Po topology network. Furthermore, magnetic study shows that there exists very weak antiferromagnetic exchange coupling in the complex.