Synthetic, structural, and electrochemical studies of two diiron propane-1,3-dithiolate complexes with ethyldiphenylphosphine or dicyclohexylphenylphosphine

Abstract

Herein, we report the preparation and characterization of two diiron carbonyl complexes with ethyldiphenylphosphine or dicyclohexylphenylphosphine. Me₃NO-driven decarbonylation of complex [Fe₂(CO)₆(µ-SCH₂CH₂CH₂S)] (1) with the corresponding phosphine ligands afforded the products [Fe₂(CO)₅(Ph₂PCH₂CH₃)(µ-SCH₂CH₂CH₂S)] (2) and [Fe₂(CO)₅PhP(C₆H₁₁)₂(µ-SCH₂CH₂CH₂S)] (3) in 91% and 84% yields, respectively. The structures of complexes 2 and 3 have been identified by spectroscopy, elemental analysis, and X-ray diffraction analysis. Moreover, the electrochemistry was investigated by cyclic voltammetry.

Keywords:

• Cyclic voltammetry
• diiron carbonyl complex
• [FeFe]-hydrogenases
• phosphine ligand
• X-ray diffraction analysis

Disclosure statement

No potential conflict of interest was reported by the authors.

Supplementary material

CCDC 2022265 and 2022266 contain the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_request/cif.

Additional information

Funding

This research was supported by Zhejiang Provincial Natural Science Foundation of China under Grant LY19B020002, 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.