Di-μ-chlorido-bis[chlorido(4′-p-tolyl-2,2′:6′,2′′-terpyridine-κ3N,N′,N′′)nickel(II)]: a supramolecular system constructed by C—H...Cl interactions

Abstract

The title complex, [Ni(2)Cl(4)(C(22)H(17)N(3))(2)], was synthesized solvothermally. The molecule is a centrosymmetric dimer with the unique Ni(II) centre in a distorted octahedral N(3)Cl(3) coordination environment. The chloride bridges are highly asymmetric. In the 4'-p-tolyl-2,2':6',2''-terpyridine ligand, the p-tolyl group is perfectly coplanar with the attached pyridine ring, and this differs from the situation found in previously reported compounds; however, there are no pi-pi interactions between the ligands. The terminal Cl atom forms four intermolecular C-H...Cl hydrogen bonds with one methyl and three methine groups. The methyl group also forms intermolecular C-H...pi interactions with a pyridine ring. These nonclassical hydrogen bonds extend the molecule into a three-dimensional network.