{1,1'-(Dimethylsilylene)bis[methanechalcogenolato]}diiron complexes [2Fe2E(Si)] (E=S, Se, Te)-[FeFe] hydrogenase models

Ulf Peter Apfel, Helmar Görls, Greg A.N. Felton, Dennis H. Evans, Richard S. Glass, Dennis L. Lichtenberger, Wolfgang Weigand

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


(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 [Fe 3(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.

Original languageEnglish (US)
Pages (from-to)2168-2175
Number of pages8
JournalHelvetica Chimica Acta
Issue number11
StatePublished - Nov 2012


  • Electrocatalysis
  • Hydrogenase
  • Iron complexes
  • Selenium complexes
  • Tellurium complexes
  • X-Ray crystallography

ASJC Scopus subject areas

  • Catalysis
  • Biochemistry
  • Drug Discovery
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry


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