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Di-iron aza diphosphido complexes: Mimics for the active site of Fe-only hydrogenase, and effects of changing the coordinating atoms of the bridging ligand in [Fe2μ-(ECH2)2NR(CO)6]

Abstract : The bis(phosphido)-bridged complex [Fe2(μ-PPhH) 2(CO)6] (1) undergoes double deprotonation to give the phosphorus-centered dianionic derivative [Fe2(μ-PPh) 2(CO)6]2- (2) which in turn reacts with the tertiary base RN(CH2Cl)2 to give [Fe 2(PPhCH2)2NR-(CO)6] (3) in moderate yield. Treatment of 3 with HBF4·Et2O affords the N-protonated species [Fe2(PPhCH2) 2NHR(CO)6] BF4 (4). The structural changes to the heavy atom skeleton of 3 arising from protonation are slight, the most obvious being a ca. 0.03 Å lengthening of the N-C bonds.
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https://hal.univ-brest.fr/hal-01763877
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Submitted on : Wednesday, April 11, 2018 - 2:58:32 PM
Last modification on : Thursday, October 3, 2019 - 8:50:02 AM

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P. Das, Jean-François Capon, Frederic Gloaguen, François Pétillon, Philippe Schollhammer, et al.. Di-iron aza diphosphido complexes: Mimics for the active site of Fe-only hydrogenase, and effects of changing the coordinating atoms of the bridging ligand in [Fe2μ-(ECH2)2NR(CO)6]. Inorganic Chemistry, American Chemical Society, 2004, 43 (26), pp.8203-8205. ⟨10.1021/ic048772+⟩. ⟨hal-01763877⟩

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