SYNTHESIS AND STRUCTURES OF COPPER(II) AND CADMIUM(II) COMPOUNDS BASED ON PYRIDAZINE DERIVATIVE LIGANDS

摘要

The two new compounds [Cu(HODA)_2(H_2O)_2] · 3H_2O (I) and [Cd(HODA)_2(H_2O)_3] (II) (HODA = 6-oxo-1,6-dihydropyridazine-4-carboxylic acid) based on pyridazine derivation ligands have been synthesized and characterized by elemental analysis, infrared spectrum and X-ray single crystal diffraction. X-ray analysis shows that in compound I, Cu~(2+) ion is four-coordinated with a plane square geometry while Cu~(2+) ion in compound II is seven-coordinated with a distorted pentagonal bipyramid geometry. Both of the two units are all connected as 3D supramolecular structures by the intermolecular hydrogen bonds. Moreover, thermal gravimetric analysis of two compounds has been also investigated.