Synthesis and Characterization of Zinc(II) and Cadmium(II) Mixed Ligand Trichloroacetate Complexes

Abstract

Mixed ligand, iso-structural zinc(II), [Zn(L₁)₂(L₂)₂] 1 and cadmium(II), [Cd(L₁)₂(L₂)₂] 2, (L₁ = CCl₃COO⁻, L₂ = N,N,N′,N′-tetramethylethylenediamine (tmen)), trichloroacetate complexes have been prepared and characterized by elemental, spectroscopic (ir, nmr), thermogravimetry, molar conductivity, and X-ray studies in 2. The trichloroacetate acts as a monodentate and tmen ligand L₂ functions as a bidentate ligand in both the complexes. The crystal structure of 2 is of monoclinic system, space group P2₁/n with a = 8.3302(19) Ǻ, b = 17.756(4) Ǻ, c = 18.619(4) Ǻ, β = 100.393(3)°, and V = 2708.8(10) Ǻ³, Z = 4. The geometry around the metal is distorted octahedral.

Keywords:

• cadmium(II)
• mixed ligand complexes
• trichloroacetate
• X-ray crystallography
• zinc(II)

Acknowledgments

Ms. Deepika Saini gratefully acknowledges the meritorious fellowship as a financial assistance from U. G. C., New Delhi, India. The project “Factoría de Cristalización, CONSOLIDER INGENIO-2010” provided X-ray structural facilities for this work.