A Novel Water-Rich Mononuclear Copper(II) Complex with Pyridine-2,4-Dicarboxylate: Synthesis and Crystal Structure

摘要

A new monomolecular copper(II) complex, [Cu(Phen)2(Pda)] · 9H2O (I) (H2Pda = pyridine-2,4-dicarboxylate acid, Phen = 1,10-phenanthroLine), has been prepared from H2Pda and Phen at room temperature and characterized by IR, elemental analysis, X-ray powder diffraction, and single-crystal X-ray diffraction. Structure analysis shows that each Cu(II) is coordinated by two Phen ligands and one Pda ligand to complete a octahedron CuN5O cliromophore. In addition, a unique water networks paralleling to (001) composed by the crystallization water through hydrogen bonds play a important role in the stability of crystal structure. The crystal structure is found to be orthorombic with space group Pbcn and cell parameters a = 13.651 (4), b = 22.516(7), c = 22.386(7) A, R1 = 0.0735 and wR2 = 0. 0.1935.