Citation: GAO Xian-Jing, LIU Hai-Xiong, CHEN Hui, MA Cheng-Bing, CHEN Chang-Neng. Syntheses and Characterization of Two Diiron Dithiolate Complexes with Electron-withdrawing and Electron-donating Substitution[J]. Chinese Journal of Structural Chemistry, ;2016, 35(8): 1195-1203. doi: 10.14102/j.cnki.0254-5861.2011-1031 shu

Syntheses and Characterization of Two Diiron Dithiolate Complexes with Electron-withdrawing and Electron-donating Substitution

1.
a College of Chemistry, Fuzhou University, Fuzhou 350108, China;
2.
b State Key Laboratory of Structural, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Science, Fuzhou 350002, China

Received Date: 29 October 2015
Available Online: 22 January 2016
Fund Project:

Two diiron dithiolate complexes[Fe₂(CO)₆(1,8-S₂-2-CH₂OOCPhC₁₀H₅)] 1 and [Fe₂(CO)₆(1,8-S₂-2-CH₂OOCPh-4-NO₂C₁₀H₅)] 2 were synthesized in high yield. The complexes have been confirmed by single-crystal X-ray diffraction and characterized by IR, UV-Vis, ¹H NMR spectroscopy and cyclic voltammetry. They contain a butterfly Fe₂S₂ core with the Fe₁-Fe₂ distances of 2.5237(7)Å in 1 and 2.5125(12)Å in 2, falling in the normal range of Fe-Fe bond length (2.49~2.57Å). The cyclic voltammetry has been used to investigate the electrochemical properties and the electrocatalytic proton reduction for 1 and 2. The complexes display reduction peaks at -1.074 V, -1.535 V (1) and -0.869 V, -1.247 V (2) vs. Fc/Fc⁺, respectively. With using p-TsOH acid of different concentration, the reduction peak of complex 2 grows non-linear; on the contrary, that of complex 1 is linear with the addition of the acid. Cyclic voltammetry revealed the two complexes are good catalysts in the CH₃CN/NBu₄PF₆ solution.
- [Fe-Fe]-hydrogenases,
- electrochemistry,
- naphthalene,
- thiolate,
- electron-withdrawing
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