Journal of Chemical Sciences

, Volume 129, Issue 10, pp 1595–1601 | Cite as

Reaction of three cyclic thioester ligands with triiron dodecacarbonyl and possible reaction mechanisms

  • Zhiyin Xiao
  • Yongli Wang
  • Xueyuan Chen
  • Jiao Long
  • Zhenhong Wei
Regular Article

Abstract

Abstract

Three cyclic thioesters of the formula “\(-\hbox {SCH}_{2}\hbox {CH}_{2}\hbox {SCO}(\hbox {CH}_{2})_{\mathrm{n}}-\)” (\(\mathbf{L}_{\mathbf{1}}, \hbox {n} = 0; \mathbf{L}_{\mathbf{2}}, = 1, \mathbf{L}_{\mathbf{3}}, \hbox {n} = 2\)) and their reactions with \(\hbox {Fe}_{3}(\hbox {CO})_{12}\) are reported. All the reactions produced a known diiron complex, [\(\hbox {Fe}_{2}(\upmu \hbox {-}\hbox {S}_{2}\hbox {C}_{2}\hbox {H}_{4})(\hbox {CO})_{6}\)] (1), which suggested that in the reactions, cleavage of C-S bond to generate “\(\hbox {SCH}_{2}\hbox {CH}_{2}\hbox {S}\)” fragment is a common pathway for all the three ligands. In the case of ligand \(\mathbf{L}_{\mathbf{2}}\), a new complex 2, [\(\hbox {Fe}_{2}\{\upmu \hbox {-}\hbox {SC}_{2}\hbox {H}_{4}(\hbox {SCH}_{2})\hbox {-}\upkappa \}(\hbox {CO})_{6}\)] was isolated and structurally characterized. In the reaction of ligand \(\mathbf{L}_{\mathbf{3}}\), an unknown iron carbonyl product was isolated in addition to complex 1. Although its precise structure was not established due to its instability and low yield, its infrared spectrum and decomposing into complex 1 implied that the product may be a cluster with higher nuclearity. The experimental observations suggested that with the increase of the ring size of the cyclic thioester ligands, further bond cleavages were involved in the reaction in addition to that leading to complex 1.

GRAPHICAL ABSTRACT

SYNOPSIS Reaction of cyclic thioester ligands with triiron dodecacarbonyl leads to scission of C-S (C) bond which is initiated by the coordination of the S atom to the Fe atom. The larger the ring size of the ligand, the more diverse are the bond cleavages.

Keywords

Iron-sulfur carbonyl complexes cyclic thioesters C-S bond cleavage reaction mechanism 

Notes

Acknowledgements

We thank the Natural Science Foundation of Zhejiang Province (Grant No. LQ17B01004) and the Key Project for Student Research Training of Jiaxing University (851716048) for supporting this work.

Supplementary material

12039_2017_1372_MOESM1_ESM.docx (650 kb)
Supplementary material 1 (docx 649 KB)

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Copyright information

© Indian Academy of Sciences 2017

Authors and Affiliations

  1. 1.College of Biological, Chemical Sciences and EngineeringJiaxing UniversityJiaxingChina
  2. 2.Department of ChemistryNanchang UniversityNanchangChina

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