Iridium half-sandwich complexes with di- and tridentate bis(pyridylimino)isoindolato ligands: stoichiometric and catalytic reactivity
A series of κ2-(N,N)-coordinated bis(2-pyridylimino)isoindolato (BPI) complexes [Cp*Ir(BPI)Cl], which possess “three-legged piano-stool” structures, with the iridium atom being coordinated by the Cp* ligand 2 × N and Cl, were prepared via deprotonation of the BPIH ligands with either potassium hydri...
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| Hauptverfasser: | , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
January 15, 2015
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| In: |
Organometallics
Year: 2015, Jahrgang: 34, Heft: 11, Pages: 2326-2342 |
| ISSN: | 1520-6041 |
| DOI: | 10.1021/om501138t |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1021/om501138t
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| Verfasserangaben: | Astrid L. Müller, Tim Bleith, Torsten Roth, Hubert Wadepohl, and Lutz H. Gade |
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| 520 | |a A series of κ2-(N,N)-coordinated bis(2-pyridylimino)isoindolato (BPI) complexes [Cp*Ir(BPI)Cl], which possess “three-legged piano-stool” structures, with the iridium atom being coordinated by the Cp* ligand 2 × N and Cl, were prepared via deprotonation of the BPIH ligands with either potassium hydride or LDA and subsequent reaction with [Cp*IrCl2]2 in THF. Cationic complexes [Cp*Ir(BPI)]+ containing κ3-(N,N,N)-coordinated BPI ligands were prepared as well as complexes with bidentate-coordinated BPI ligands, where the chloride ligand was substituted by either neutral or anionic ligands. Substitution in the ortho-position of the PBI ligands led to the formation of cycloiridated κ3-(N,N,C) species. Upon substitution of the anionic ligand by triphenylphosphine, a product was obtained with a hitherto unobserved κ2-(N,N) coordination of oMe-BPI to the metal center via the deprotonated nitrogen atom of the isoindole unit and one of the imine nitrogen atoms of the BPI ligand. A series of (para-cymene) osmium half-sandwich complexes with analogous structures and reactivities to their isoelectronic Cp*Ir(BPI) congeners were also prepared. Finally, it has been demonstrated that both Ir and Os complexes are catalytically active in the transfer hydrogenation of various ketones and imines. | ||
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| 700 | 1 | |a Roth, Torsten |e VerfasserIn |0 (DE-588)1119835763 |0 (DE-627)872927806 |0 (DE-576)480027935 |4 aut | |
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| 700 | 1 | |a Gade, Lutz H. |d 1963- |e VerfasserIn |0 (DE-588)1019812737 |0 (DE-627)691026750 |0 (DE-576)358881870 |4 aut | |
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