Synthesis, Characterizations, and Crystal Structure of Copper(II) Complex Containing, 2, 6-Pyridinedicarboxylate and, 1, 2-Bis(4-pyridyl)ethane

Abstract

A novel copper(II) complex, [Cu2(pda)2(dpe)(H2O)2] ･2H2O (1) (pda =2,6-pyridinedicarboxylate, dpe = 1,2-bis(4-pyridyl)ethane), has been hydrothermally synthesized and characterized by FTIR spectroscopy and single crystal X-ray diffraction. The metal ion center is in the distorted square-pyramidal coordination environment. Oxygen atom from one water hold the axial sites, and two oxygen atoms from one pda ligand, two nitrogen atoms from one pda ligand and the dpe occupy the square planar sites. The complex 1 is in a dumbbell shape which contains two copper atoms, two pda ligands, one dpe ligand, two coordination water ligands and two lattice water molecules. In addition, the intermolecular O-H…O hydrogen-bonding and π-π stacking interactions further extend the title complex to form a 3-D structure.