{1,1′‐(Dimethylsilylene)bis[methanechalcogenolato]}diiron Complexes [2Fe2E(Si)] (E=S,Se, Te) – [FeFe] Hydrogenase Models |
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| Authors: | Ulf‐Peter Apfel Helmar Görls Greg A. N. Felton Dennis H. Evans Richard S. Glass Dennis L. Lichtenberger Wolfgang Weigand |
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| Affiliation: | 1. Institut für Anorganische und Analytische Chemie, Friedrich‐Schiller‐Universit?t Jena, Humboldtstrasse 8, D‐07743 Jena;2. Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA;3. Department of Chemistry and Biochemistry, The University of Arizona, Tucson, AZ, 85721, USA;4. Department of Chemistry, Purdue University, West Lafayette, IN, 47907, USA |
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| Abstract: | (Bis‐selenolato) and (bis‐tellurolato)diiron complexes [2Fe2E(Si)] were prepared and compared with the known (bis‐thiolato)diiron complex A to assess their ability to produce hydrogen from protons. Treatment of [Fe3(CO)12] with 4,4‐dimethyl‐1,2,4‐diselenasilolane ( 1 ) in boiling toluene afforded hexacarbonyl{μ‐{[1,1′‐(dimethylsilylene)bis[methaneselenolato‐κSe : κSe]](2 ?)}}diiron(Fe? Fe) ( 2 ). The analog bis‐tellurolato complex hexacarbonyl{μ‐{[1,1′‐(dimethylsilylene)bis[methanetellurolato‐κTe : κTe]](2 ?)}}diiron(Fe? Fe) ( 3 ) was obtained by treatment of [Fe3(CO)12] with dimethylbis(tellurocyanatomethyl)dimethylsilane, which was prepared in situ. All compounds were characterized by NMR, IR spectroscopy, mass spectrometry, elemental analysis and single‐crystal X‐ray analysis. The electrocatalytic properties of the [2Fe2X(Si)] (X=S, Se, Te) model complexes A, 1 , and 2 towards hydrogen formation were evaluated. |
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| Keywords: | Hydrogenase Iron complexes Selenium complexes Tellurium complexes Electrocatalysis X‐Ray crystallography |
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