Synthesis and structural characterization of two diiron complexes with diphenyl-2-pyridylphosphine or tris(3-fluorophenyl)phosphine

Abstract

In this paper, two diiron complexes have been prepared by CO exchange and structurally characterized. Treatment of complex [Fe₂(CO)₆{μ-SCH₂CH(CH₂O₂CCH₃)S}] (1) with diphenyl-2-pyridylphosphine in the presence of Me₃NO·2H₂O as the decarbonylating agent gave the corresponding monophosphine-substituted complex [Fe₂(CO)₅{Ph₂P(2-C₅H₄N)}{μ-SCH₂CH(CH₂O₂CCH₃)S}] (2) in 85% yield. Similarly, complex [Fe₂(CO)₅{P(3-C₆H₄F)₃}{μ-SCH₂CH(CH₂O₂CPh)S}] (4) was obtained in 78% yield by the reaction of complex [Fe₂(CO)₆{μ-SCH₂CH(CH₂O₂CPh)S}] (3) with tris(3-fluorophenyl)phosphine. The new complexes 2 and 4 have been characterized by elemental analysis, IR spectroscopy, NMR spectroscopy, as well as by X-ray diffraction analysis.

Keywords:

• Diiron complex
• [FeFe]-hydrogenases
• Monophosphine ligand
• Synthesis
• Crystal structure

Additional information

Funding

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