Synthesis of Zinc Dimethyldithiocarbamate by Reductive Disulfide Bond Cleavage of Tetramethylthiuram Disulfide in Presence of Zn2+

Document Type : Research Paper

Authors

1 Department of Chemistry, Isfahan University of Technology

2 Faculty of Chemistry, Vienna University of Technology

Abstract

The zinc(II) complex [Zn2(dmdtc)2(μ-dmdtc)2] has been synthesized directly from thiram ligand, containing a disulfide bond {dmdtc = N,N-dimethyldithiocarbamate; thiram = N,N-tetramethylthiuram disulfide}, and characterized by elemental analysis and spectroscopic methods. Surprisingly thiram, undergoes a reductive disulfide bond scission upon reaction with Zn2+ in methanolic media to give the [Zn2(dmdtc)2(μ-dmdtc)2] complex. The crystal structure of Zn(II) complex has been determined by single crystal X-ray diffraction. Zinc is 4+1 coordinate, with four nearly identical tetrahedral bonds and a longer fifth bond being similar to some reported [Zn(dtc)2(L)] complexes. The crystal structure of this complex is built up of dimeric units, [Zn(dmdtc)(μ-dmdtc)2], so that each unit has two thiocarbamate groups, one wholly bound to a zinc atom as a bidentate ligand and the other in a bridging coordination mode between the two Zn(II) atoms. This structure clearly shows scission of the disulfide bond in the thiram ligand to give two dimethyldithiocarbamate ligands coordinated to the Zn(II) ion.

Keywords

References

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Inorganic Chemistry Research
Volume 1, Issue 1
Spring and Summer
2017
Pages 79-84

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History

  • Receive Date: 26 January 2015
  • Accept Date: 13 May 2016

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