A Novel 3D Supramolecular Network Constructed from [Cu(4,4'-bipyridine)(O_2CMe)_2]_2 Molecular Ladders by Hydrogen Bonding

The title complex, {[Cu2(4,4'-bipyridine)2(μ-O2CMe)2(O2CMe)2]'H2O}n 1, was synthesized and structurally characterized by X-ray crystallography. It crystallizes in monoclinic, space group C2/c with a = 13.4474(5), b = 11.7566(2), c = 19.5380(6) ', β = 92.930(2)°, V = 3084.84(16) '3, Z = 4, Cu2C28N4O9H30, Mr = 693.64, Dc = 1.494 g/cm3, F(000) = 1424 and μ(MoKa) = 1.436 mm-1. With the use of 2062 observed reflections (I 2σ(I)), the structure was refined to R = 0.0769 and wR = 0.2154. In complex 1, the dimeric copper acetate units are linked through 4,4'-bipyridine to yield 1D molecular ladders. These ladders are connected via O–H···O hydrogen bonds to generate 2D layers, which are further linked through C–H···O hydrogen bonds to give a 3D supramolecular network.