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[IrCl{N(CHCHPtBu2)2}]−: a versatile source of the IrI(PNP) pincer platformElectronic supplementary information (ESI) available. CCDC 967913, 967914, 967915 and 973313. For ESI and crystallographic data in CIF or other electronic format see DOI: 10.1039/c3dt53304b

The iridium( ii ) complex [IrCl{N(CHCHP t Bu 2 ) 2 }] is reduced by KC 8 to give the anionic iridium( i ) pincer complex [IrCl{N(CHCHP t Bu 2 ) 2 }] − which was isolated and fully characterized upon stabilization of the counter cation with crown ether as [K(15-cr-5) 2 ][IrCl{N(CHCHP t Bu 2 ) 2 }]. T...

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Main Authors: Kinauer, Markus, Scheibel, Markus G, Abbenseth, Josh, Heinemann, Frank W, Stollberg, Peter, Würtele, Christian, Schneider, Sven
Format: Article
Language:English
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Summary:The iridium( ii ) complex [IrCl{N(CHCHP t Bu 2 ) 2 }] is reduced by KC 8 to give the anionic iridium( i ) pincer complex [IrCl{N(CHCHP t Bu 2 ) 2 }] − which was isolated and fully characterized upon stabilization of the counter cation with crown ether as [K(15-cr-5) 2 ][IrCl{N(CHCHP t Bu 2 ) 2 }]. This unprecedented anionic iridium( i ) pincer complex completes the unusual, structurally characterized Ir I /Ir II /Ir III redox series [IrCl{N(CHCHP t Bu 2 ) 2 }] −/0/+ , all in a square-planar coordination geometry, emphasizing the versatility of this PNP pincer ligand in stabilizing a broad range of oxidation states. The anionic chloro complex is a versatile source of the Ir(PNP) platform. Its reactivity was examined towards chloride ligand substitution against CO and N 2 , and oxidative addition of C-electrophiles, C-H bonds and dioxygen, allowing for the isolation of iridium( i ) and iridium( iii ) (PNP) carbonyl, hydrocarbyl and peroxo complexes which were spectroscopically and crystallographically characterized. The iridium( ii ) complex [IrCl{N(CHCHP t Bu 2 ) 2 }] is reduced by KC 8 to give the anionic iridium( i ) pincer complex [IrCl{N(CHCHP t Bu 2 ) 2 }] − which was isolated and fully characterized upon stabilization of the counter cation with crown ether as [K(15-cr-5) 2 ][IrCl{N(CHCHP t Bu 2 ) 2 }].
ISSN:1477-9226
1477-9234
DOI:10.1039/c3dt53304b