Synthesis of catena-Poly[[di-aqua(2,2′-bipyridine)copper (II)]-μ2-sulfato-κ2O:O'] 1D coordination polymer and [di-chloro (2,2′-bipyridine)copper(II)] complex, redetermination of their crystal structures

The title compounds [Cu(bpy)(H2O)(2)(SO4)](n )(1) and [Cu(bpy)Cl2] (2) were successfully synthesized, and their crystal structures were redetermined as some corrections were needed. The Cu(II) centers in 1 are coordinated in elongated octahedral geometry by the two nitrogen atoms of a bpy ligand and four oxygen atoms belonging to aqua molecules and sulfato ligands, forming a polymeric chain by bridging the sulfato ligands. The Cu(II) center in 2 is coordinated by the two chloride ions and the two nitrogen atoms of the bipyridine ligand, forming a distorted square planar geometry. The [Cu(bpy)(H2O)(2)(SO4)](n )complex crystallizes in the monoclinic crystal system with space group C2/c. The unit cell parameters were determined to be a =15.154(3) angstrom, b =12.477(3) angstrom, c = 7.0158(14) angstrom, alpha = 90 degrees, beta = 105.873(12)degrees, gamma = 90 degrees, V = 1276.0(5) angstrom(3), Z = 4. The Cu-N, Cu-O(aqua) and Cu-O (sulfate) bond lengths are 2.000(3) angstrom, 1.978(2) angstrom and 2.464(2) angstrom, respectively. The [Cu(bpy)Cl-2] complex crystallizes in the monoclinic crystal system with space group I2/a. The unit cell parameters were determined to be a = 7.306(2) angstrom, b = 9.016(2) angstrom, c = 15.879(6) angstrom, alpha = 90, fi = 92.141(15), gamma = 90 degrees, V =1045.2(5) angstrom(3), Z = 4. The Cu-N and Cu-Cl bond lengths are 2.031(5) angstrom and 2.2662(17) angstrom, respectively.