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

A novel metal coordination polymer, {[Cu-2(L)(2)(Phen)(2)] center dot 8H(2)O}(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.