Synthesis and Structure of Heterometallic Chromium(III) Complexes with Ethylenediaminetetraacetic Acid

摘要

The complexes [M(Tsc)_2][Cr(Edta)]_2,where M is Ni,Cu;Tsc is thiosemicarbazide;Edta~(4-) is the ethylenediaminetetraacetate anion,were synthesized and characterized by X-ray diffraction.The ionic structures are composed of the [M(Tsc)_2]~(2+) cations and [Cr(Edta)]~- anions with a component ratio of 1:2.The cation has a distorted trans-square coordination.The carboxyl groups of the H_4Edta molecule are deprotonated and the ligand is attached to the Cr atom in the hexadentate chelating mode.The cations and anions are linked by a system of hydrogen bonds.