Diiron butane-1,2-dithiolate pentacarbonyl complexes with tris(3-fluorophenyl)phosphine or tris(3-chlorophenyl)phosphine: synthesis, structures, and electrochemistry

Abstract

In this report, we describe the preparation of two diiron butane-1,2-dithiolate pentacarbonyl complexes with tris(3-fluorophenyl)phosphine or tris(3-chlorophenyl)phosphine as mimics for the active site of [FeFe]-hydrogenases. The two complexes were synthesized by the reactions of hexacarbonyl complex [Fe₂(CO)₆{µ-SCH₂CH(CH₂CH₃)S}] (1) with the corresponding tertiary phosphine ligands by using Me₃NO·2H₂O as the decarbonylation reagent in 70% and 66% yields, respectively. The new complexes were characterized by means of elemental analysis, spectroscopy, and X-ray crystallography. Furthermore, the electrochemistry was studied by cyclic voltammetry.

KEYWORDS:

• Diiron complex
• electrochemistry
• [FeFe]-hydrogenases
• spectroscopy
• X-ray crystallography

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This research was supported by Zhejiang Provincial Natural Science Foundation of China under Grant LY19B020002, Scientific Research Foundation of Ningbo University of Technology, National Natural Science Foundation of China under Grant 21501124, Science & Technology Department of Sichuan Province under Grant 2018JY0235, Education Department of Sichuan Province under Grant 18ZA0337, and Sichuan University of Science & Engineering under Grant S201910622022.