Abstract
The displacement of terminal CO ligands in Fe2(μSe 2C3H5CH3)(CO)6 (1) by triphenylphosphane, trimethyl phosphite, and bis(diphenylphosphanyl)ethane (dppe) li:jands is investigated. Treatment of 1 with 1. equiv. of triphenylphosphane afforded Fe2(μ-Se2C3H 5CH3)(CO)5(PPh3) (2). The mono- and disubstituted phosphite complexes Fe2(μSe2C 3H5CH3)(CO)5P(OMe)3(3) and Fe2(μ-Se2C3H5CH 3)(CO)4-[P(OMe)3]2 (4) were obtained from the reaction of 1 with excess P(OMe)3 at reflux in toluene. In contrast, the reaction of 1 with 1 equiv. of dppe in the presence of Me 3NO-2H2O gave a mixture of Fe2(μ-Se 2C3H5CH3)(CO)4(κ 2-dppe) (5) and [Fe2(μ-Se2C 3H5CH3)(CO)5]2(μ-dppe) (6). The newly synthesized complexes 2-6 were fully characterized by IR, 1H NMR, 13C NMR, 77Se{1H} NMR, and 31P{1H} NMR spectroscopy, mass spectrometry, elemental analysis, and X-ray diffraction analysis. Complex 2 has proved to be a catalyst for the electrochemical reduction of the weak acid, acetic acid, to give molecular hydrogen.
Original language | English (US) |
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Pages (from-to) | 3414-3420 |
Number of pages | 7 |
Journal | European Journal of Inorganic Chemistry |
Issue number | 23 |
DOIs | |
State | Published - Aug 1 2009 |
Keywords
- Electrocatalysis
- Enzyme catalysis
- Hidrogenases
- Iron
- Ligand effects
- Selenium
- Substitution
ASJC Scopus subject areas
- Inorganic Chemistry