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Iridium complexes containing a PNP pincer ligand: syntheses, structural chemistry, and bond activations

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-cyclo...

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Bibliographic Details
Main Authors: Grüger, Nora (Author) , Wadepohl, Hubert (Author) , Gade, Lutz H. (Author)
Format: Article (Journal)
Language:English
Published: 02 September 2013
In: European journal of inorganic chemistry
Year: 2013, Issue: 30, Pages: 5358-5365
ISSN:1099-0682
DOI:https://doi.org/10.1002/ejic.201300857
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/https://doi.org/10.1002/ejic.201300857
Verlag, lizenzpflichtig, Volltext: https://chemistry-europe.onlinelibrary.wiley.com/doi/abs/10.1002/ejic.201300857
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Author Notes:Nora Grüger, Hubert Wadepohl, and Lutz H. Gade
Description
Summary: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).
Item Description:Gesehen am 17.02.2021
Physical Description:Online Resource
ISSN:1099-0682
DOI:https://doi.org/10.1002/ejic.201300857

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