Electron-Transfer-Catalyzed Rearrangement of Unsymmetrically Substituted Diiron Dithiolate Complexes Related to the Active Site of the [FeFe]-Hydrogenases - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Inorganic Chemistry Année : 2007

Electron-Transfer-Catalyzed Rearrangement of Unsymmetrically Substituted Diiron Dithiolate Complexes Related to the Active Site of the [FeFe]-Hydrogenases

Résumé

Novel asymmetrically substituted azadithiolate compounds [Fe2(CO)4(κ2-dppe){μ-SCH2N(R)CH2S}] (R = iPr, 1a; CH2CH2OCH3, 1b; CH2C6H5, 1c) have been synthesized by treatment of [Fe2(CO)6(μ-adt)] [adt = SCH2N(R)CH2S, with R = iPr, CH2CH2OCH3, CH2C6H5] with dppe (dppe = Ph2PCH2CH2PPh2) in refluxing toluene in the presence of Me3NO. 1a−c have been characterized by single-crystal X-ray diffraction analyses. The electrochemical investigation of 1a−c and of [Fe2(CO)4(κ2-dppe)(μ-pdt)] (1d) [pdt = S(CH2)3S] in MeCN− and THF−[NBu4][PF6] has demonstrated that the electrochemical reduction of 1a−d gives rise to an Electron-transfer-catalyzed (ETC) isomerization to the symmetrical isomers 2a−d where the dppe ligand bridges the iron centers. Compounds 2a−d were characterized by IR and NMR spectroscopy, elemental analysis, and X-ray crystallography for 2a.

Domaines

Chimie

Dates et versions

hal-01581411 , version 1 (04-09-2017)

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Citer

Salah Ezzaher, Jean-François Capon, Frederic Gloaguen, François Y. Pétillon, Philippe P. Schollhammer, et al.. Electron-Transfer-Catalyzed Rearrangement of Unsymmetrically Substituted Diiron Dithiolate Complexes Related to the Active Site of the [FeFe]-Hydrogenases. Inorganic Chemistry, 2007, 46 (23), pp.9863 - 9872. ⟨10.1021/ic701327w⟩. ⟨hal-01581411⟩
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