Iridium complexes containing a PNP pincer ligand

• Verfasst von: Grüger, Nora [VerfasserIn]
• Verfasst von: Wadepohl, Hubert [VerfasserIn]
• Verfasst von: Gade, Lutz H. [VerfasserIn]
• Titel: Iridium complexes containing a PNP pincer ligand
• Titelzusatz: syntheses, structural chemistry, and bond activations
• Verf.angabe: Nora Grüger, Hubert Wadepohl, and Lutz H. Gade
• E-Jahr: 2013
• Jahr: 02 September 2013
• Umfang: 8 S.
• Fussnoten: Gesehen am 17.02.2021
• Titel Quelle: Enthalten in: European journal of inorganic chemistry
• Ort Quelle: Weinheim : Wiley-VCH, 1998
• Jahr Quelle: 2013
• Band/Heft Quelle: (2013), 30, Seite 5358-5365
• ISSN Quelle: 1099-0682
• DOI: doi:10.1002/ejic.201300857
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Bond activation
• Sach-SW: Hydrides
• Sach-SW: Iridium
• Sach-SW: N
• Sach-SW: Oxidative addition
• Sach-SW: P ligands
• K10plus-PPN: 174598707X

Abstract

The coordination chemistry of the monoanionic PNP pincer ligand 3,6-di-tert-butyl-1,8-bis[(diphenylphosphanyl)methyl]carbazole (Cbzdiphos) was investigated for different iridium(I) and iridium(III) complexes. Reaction of the protio ligand with [Ir(acac)(cod)] (acac = acetylacetonate; cod = 1,5-cyclooctadienyl) gave [(Cbzdiphos)Ir(cod)] (1). Upon hydrogenation the dihydrido complex [(Cbzdiphos)IrH2] (2) was obtained, and its reactivity in different organometallic transformations was examined. Treating 2 with ammonia afforded [(Cbzdiphos)IrH2(NH3)] (3), whereas treatment with diphenylacetylene (dpa) yielded the IrI compound [(Cbzdiphos)Ir(dpa)] (4) and trans-stilbene. Furthermore, the conversion with norbornene led to a reactive species, which activated C-H and C-Cl bonds. The reaction with THF gave a Fischer carbene [(Cbzdiphos)Ir=C(OC3H6)] (8) after double C-H bond activation, whereas treatment with benzene or chlorobenzene afforded the oxidative addition products [(Cbzdiphos)Ir(Ph)H] (5) and [(Cbzdiphos)Ir(Ph)Cl] (7).