Synthesis, Properties, and Crystal and Molecular Structure of Chloro[N,N-bis(2-hydroxyethyl)glycinato]copper(II)

Abstract

Abstract The crystal and molecular structure of the title copper(II) complex was determined by the X-ray diffraction method. The crystal is orthorhombic with the space group Pbca, Z=8, a=14.18(1), b=15.835(7), c=8.188(3) Å. Full matrix least-squares refinements have led to a final R value of 0.047 for 2128 reflections. The copper atom is in a trigonal-bipyramidal geometry, ligated by a nitrogen atom, an oxygen atom of carboxylato group, two hydroxyl oxygen atoms and a chlorine atom. The complex has three five-membered chelate rings which are formed by one copper, one nitrogen, one oxygen, and two carbon atoms. There are two hydrogen bonds formed between the non-coordinated carboxylato oxygen atom and the hydroxyl hydrogen atom. The powder diffuse reflection spectrum of this complex exhibits a band characteristic of trigonal bipyramidal structure at 1000 nm. In the far-infrared absorption spectra of this complex, the bands at 340, 317, and 275 cm−1 are assigned to the stretching vibrations of Cu–N, Cu–Cl, and Cu–O (carboxylato), respectively.