Synthesis and crystal structure of a dinuclear zinc(II)-dithiocarbamate complex, bis{[(μ²-pyrrolidinedithiocarbamato-S,S′)(pyrrolidinedithiocarbamato-S,S′)zinc(II)]}

Abstract

A new zinc(II) complex of pyrrolidinedithiocarbamate (PDTC), bis[(μ ²-pyrrolidinedithiocarbamato-S,S′)(pyrrolidinedithiocarbamato-S,S′)zinc(II)], [Zn₂(PDTC)₄] (1) has been prepared by reaction of ZnCl₂ with ammonium pyrrolidinedithiocarbamate in 1 : 1 and 1 : 2 ratio, respectively. The complex has been characterized by IR, NMR and X-ray crystallography. Compound 1 crystallizes in the triclinic space group P 1 in the form of a centrosymmetric dimer. The solid-state structure contains two crystallographically equivalent Zn⁺² centers in a tetrahedrally distorted ion sphere. A mixed-ligand complex, [Zn(PDTC)(MSC)]⁻ (MSC = mercaptosuccinate) was also prepared but the structure of the resulting complex was found to be the same as 1, suggesting that the thiolate ligand was replaced on addition of PDTC.

Keywords:

• Zinc(II)
• Pyrrolidinedithiocarbamate
• Mercaptosuccinate
• Crystal structure

Acknowledgement

Financial support from Pakistan Council for Science and Technology, Islamabad is gratefully acknowledged.