Different Structural Networks Determined by Variation of the Ligand Skeleton in Copper(II) Diphosphinate Coordination Polymers

A new polymeric copper(II)-organic framework. [[Cu(4,4'-bipy)(p(xyl)p)(H2O)(2)]center dot 2(H2O)](n) (1; p(xyl)p = P,P'-diphenyl-p-xylenediphosphinate, 4,4'-bipy = 4,4'-bipyridine), has been synthesized. Single-crystal X-ray diffraction revealed that the structure of I consists of 2D grids connected by solvent water molecules, The temperature-dependent X-ray powder diffraction analysis of I has shown file formation of a dehydrated phase well modeled by a 3D structure with it binodal 4,6 connected topology.