Synthesis and crystal structure of a coordination polymer {[Cu2(L)2(Phen)2] · 8H2O}n

A novel metal coordination polymer, {[Cu2(L)2(Phen)2] · 8H2O}n (I), has been synthesized by the reaction of Cu(NO3)2 with 2,2′-bipyridyl-4,4′-dicarboxylic acid (L) and 1,10-phenanthroline (Phen) at room temperature. The polymer was characterized by IR, elemental analyses and X-ray diffraction. Single-crystal structural analysis reveals that the center Cu2+ ions have two coordinated types. The Cu(1) atom has the five-coordinate mode, and Cu(2) forms an is octahedron of the six-coordinate mode. Two Cu2+ ions are connected by the O atom of carboxylate group bridges. Complex I contains eight molecules of water clusters and constructed a 1D tape structure.