Substitution reactions of [FeFe]-hydrogenase model complexes containing diselenolate bridges

Substitution reactions of the carbonyl ligands of the hydrogenase model complexes [Fe2(μ-SeC3H5RSe-μ)(CO)6] (R = H, Me) by bis(diphenylphosphino)methane (dppm) has been investigated. These reactions produced either the mono-substituted complexes, [Fe2(μ-SeC3H5RSe-μ)(CO)5](κ-dppm) (R = H (1), Me (2)), or the chelated disubstituted ones, [Fe2(μ-SeC3H5RSe-μ)(CO)4](μ-dppm) (R = H (3), Me (4)). The new complexes have been characterized by elemental analysis, mass spectrometry, IR, 1H, 13C{H}, 31P{H} and 77Se{H} NMR spectroscopy. The solid state structures of complexes 1–4 were determined by X-ray crystal structure analysis.

Graphical abstractSubstitution reactions of carbonyl ligands of the hydrogenase model complexes [Fe2(μ-SeC3H5RSe-μ)(CO)6] (R = H, Me) by bis(diphenylphosphino)methane (dppm) is investigated. These reactions produced either the mono-substituted complexes [Fe2(μ-SeC3H5RSe-μ)(CO)5](κ-dppm) (R = H (1), Me (2)) or the chelated disubstituted ones [Fe2(μ-SeC3H5RSe-μ)(CO)4](μ-dppm) (R = H (3), Me (4)). These new complexes have been characterized by elemental analysis, mass spectrometry, IR, 1H, 13C{H}, 31P{H} and 77Se NMR spectroscopy. The solid state structures of complexes 1–4 were determined by X-ray crystal structure analysis.Figure optionsDownload full-size imageDownload as PowerPoint slide