Tris(2-thienyl)phosphine-substituted diiron propanedithiolate complexes: Synthesis, spectroscopy, crystal structures, electrochemistry, and fungicidal activity

Abstract

In this article, we report two diiron propanedithiolate complexes with monosubstituted tris(2-thienyl)phosphine. Reaction of [Fe₂(CO)₆{μ-SCH₂CH₂CH₂S}] (1) or [Fe₂(CO)₆{μ-SCH₂CH(CH₃)S}] (2) with one equivalent of tris(2-thienyl)phosphine and Me₃NO·2H₂O as the oxidative reagent yielded complexes [Fe₂(CO)₅P(2-C₄H₃S)₃{μ-SCH₂CH₂CH₂S}] (3) and [Fe₂(CO)₅P(2-C₄H₃S)₃{μ-SCH₂CH(CH₃)S}] (4) in 75% and 91% yields, respectively. The new complexes 3 and 4 have been characterized by elemental analysis, IR, ¹H NMR, ³¹P{¹H} NMR, and single crystal X-ray diffraction analysis. Additionally, the electrochemistry of complexes 3 and 4 has been studied by cyclic voltammetry. Interestingly, the fungicidal activity has been studied.

Graphical Abstract

Keywords:

• Diiron propanedithiolate
• [FeFe]-hydrogenase
• CO-displacement
• cyclic voltammetry
• fungicidal activity

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, Sichuan University of Science & Engineering under Grant S201910622022, and Education Department of Zhejiang Province under Grant Y201327376.