Hemilabile Pincer-Type Hydride Complexes of Iridium

Autor:	and Alan J. Lough, Aldjia Choualeb, Dmitry G. Gusev
Rok vydání:	2007
Předmět:	Hydride Organic Chemistry Butanone chemistry.chemical_element Cyclohexanone Transfer hydrogenation Medicinal chemistry Pincer movement Catalysis Inorganic Chemistry chemistry.chemical_compound chemistry Organic chemistry Iridium Physical and Theoretical Chemistry Acetophenone
Zdroj:	Organometallics. 26:5224-5229
ISSN:	1520-6041 0276-7333
DOI:	10.1021/om700550x
Popis:	The ligand tBu2PC2H4NHC2H4NEt2 (PNHN) was synthesized starting from 2-(diethylamino)ethyl chloride hydrochloride and ethanolamine. Reaction of PNHN with [IrCl(COE)2]2 under H2 afforded the dihydride cis-IrH2Cl(κ3-PNHN) (1) in excellent yield. Treatment of 1 with tBuOK led to clean formation of the 16-electron amido complex IrH2(κ3-PNN) (2). Hydrogenation of 2 in toluene or ethyl acetate produced the trihydride mer-IrH3(κ3-PNHN) (3). This complex was unstable and dimerized to give [IrH2(κ2-PNHN)]2(μ-H)2 (4) with uncoordinated NEt2 groups. The structures of 1 and 4 were established by X-ray crystallography. Complex 2 demonstrated good catalytic activity for transfer hydrogenation of acetophenone, cyclohexanone, and butanone.
Databáze:	OpenAIRE
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