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 [Fe2{μ-(ECH2)2NR}(CO)6]
- 20 November 2004
- journal article
- research article
- Published by American Chemical Society (ACS) in Inorganic Chemistry
- Vol. 43 (26) , 8203-8205
- https://doi.org/10.1021/ic048772+
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 [Fe2{(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.Keywords
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