Synthesis, characterization, and electrochemistry of phosphine-substituted diiron butane-1, 2-dithiolate complexes. Issue 15 (3rd August 2019)

• Record Type: Journal Article
• Authors: Lin, Hui-Min; Mu, Chao; Li, Ao; Liu, Xu-Feng; Li, Yu-Long; Jiang, Zhong-Qing; Wu, Hong-Ke
• Is Part Of: Journal of coordination chemistry. Volume 72:Issue 15(2019)
• Page Start: 2517
• Page End: 2530
• Publication Date: 2019-08-03
• Subjects: Diiron butane-1, 2-dithiolate -- phosphine ligand -- CO substitution -- X-ray crystallography -- electrochemistry; Coordination compounds -- Periodicals; 541.2242
• DOI: 10.1080/00958972.2019.1659248
• Languages: English
• ISSNs: 0095-8972

Abstract

Abstract: The reactions of the starting complex, [Fe2 (CO)6 { μ -SCH2 CH (CH2 CH3 )S}] (1 ), with the phosphine ligands tris(4-methylphenyl)phosphine, diphenyl-2-pyridylphosphine, tris(4-fluorophenyl)phosphine, 2-(diphenylphosphino)benzaldehyde, or benzyldiphenylphosphine in the presence of the decarbonylating agent Me3 NO·2H2 O yielded the corresponding phosphine-substituted diiron butane-1, 2-dithiolate complexes [Fe2 (CO)5 (L){ μ -SCH2 CH(CH2 CH3 )S}] (L = P(4-C6 H4 CH3 )3, 2 ; Ph2 P(2-C5 H4 N), 3 ; P(4-C6 H4 F)3, 4 ; Ph2 P(2-C6 H4 CHO), 5 ; Ph2 PCH2 Ph, 6 ) in 75%–87% yields. The complexes have been characterized by elemental analysis, IR, 1 H, and 31 P{ 1 H} NMR spectroscopy, as well as by single-crystal X-ray diffraction analysis. Moreover, the electrochemistry of 2 –4 was studied by cyclic voltammetry, suggesting that they can catalyze the reduction of protons to H2 in the presence of HOAc. Graphical Abstract: