| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1323194 | Journal of Organometallic Chemistry | 2015 | 7 Pages |
A series of iron(II) hydride complexes containing diphenylphosphine ligands is reported. In the presence of five equivalents of Ph2PH, the ionic complex trans-[(Ph2PH)4Fe(H)(NCMe)](Ph2P{BH3}2) (1) with the rather unusual Ph2P{BH3}2-anion is formed, whereas with four equivalents of Ph2PH, the fluxional cis-[(Ph2PH)4Fe(H)2] (2) can be isolated under otherwise identical conditions. Furthermore, our attempts to synthesize a mixed phosphine iron(II) hydride complex resulted in the isolation of [(dppe)(Ph2PH)Fe(H)(BH4)] (3, dppe = 1,2-bis(diphenylphosphino)ethane). The behavior of complexes 1-3 in solution was investigated by 1H NOESY NMR spectroscopy and compared with those of the corresponding ruthenium complex cis-[(Ph2PH)4Ru(H)2], revealing that no chemical exchange between the hydride ligands and the P–H-proton of the coordinated Ph2PH can be observed.
Graphical abstractA series of iron(II) hydride complexes containing diphenylphosphine ligands is reported. NMR spectroscopic investigations of the solution behavior of these complexes and of a corresponding ruthenium complex revealed that no chemical exchange between the hydride ligands and the P–H-proton and therewith no reversible heterolytic cleavage of dihydrogen can be observed.Figure optionsDownload full-size imageDownload as PowerPoint slide
