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Modeling [FeFe] hydrogenase: Synthesis and protonation of a diiron dithiolate complex containing a phosphine-N-heterocyclic-carbene ligand |
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| Authors: | Didier Morvan Frédéric Gloaguen Philippe Schollhammer Jean-Jacques Yaouanc Nelly Kervarec |
| Institution: | a Université Européenne de Bretagne, France, Université de Brest, CNRS, UMR 6521 “Chimie, Electrochimie Moléculaires et Chimie Analytique ”, ISSTB, CS 93837, 29238 Brest-Cedex 3, France b Service commun d’analyse par diffraction des rayons X, UFR Sciences et techniques, Université de Bretagne Occidentale, 6, av. Le Gorgeu - CS93837 29238 Brest Cedex 3, France c Service de RMN, UFR Sciences et techniques, Université de Bretagne Occidentale, 6, av. Le Gorgeu - CS93837 29238 Brest Cedex 3, France |
| Abstract: | The ligand exchange reaction of IMe-(CH2)2-PPh2 (IMe = 1-methyimidazol-2-ylidene) and the hexacarbonyl complex {Fe2{μ-S(CH2)3S}(CO)6] (1) resulted in the formation of the chelated complex {Fe2{μ-S(CH2)3S}(CO)4(IMe-(CH2)2-PPh2)] (2). The molecular structure of 2 was confirmed by spectroscopic and X-ray analyses. This complex catalyzes proton reduction. Low temperature NMR studies on the protonation of 2 revealed the formation of a terminal hydride intermediate. |
| Keywords: | Dihydrogen Hydrogenase Diiron complexes N-Heterocyclic carbenes |
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