Promoting Role of [PtI<sub>2</sub>(CO)]<sub>2</sub> in the Iridium-Catalyzed Methanol Carbonylation to Acetic Acid and Its Interaction with Involved Iridium Species
作者:Samuel Gautron、Nicolas Lassauque、Carole Le Berre、Laurent Azam、Roberto Giordano、Philippe Serp、Gábor Laurenczy、Jean Claude Daran、Carine Duhayon、Daniel Thiébaut、Philippe Kalck
DOI:10.1021/om060282x
日期:2006.12.1
conditions (dinitrogen, ambient temperature, CH2Cl2, PPN+ as counterion) have been adopted. [PtI2(CO)]2 (10‘) interacts with [PPN][IrI3(CH3)(CO)2] (4-PPN), affording the monoiodo-bridged anionic species [IrI2(CH3)(CO)2(μ-I)PtI2(CO)]- (11), which undergoes cleavage under CO to provide [IrI2(CH3)(CO)3] (6) and [PtI3(CO)]- (9). Although we have to take into account the possible iodide dissociation from 4 in the
Iridium complexes bearing a PNP ligand, favoring facile C(sp3)–H bond cleavage
作者:Kapil S. Lokare、Robert J. Nielsen、Muhammed Yousufuddin、William A. Goddard III、Roy A. Periana
DOI:10.1039/c1dt10577a
日期:——
Hydrogen iodide is lost upon reaction of PNP with IrI3, where PNP = 2,6-bis-(di-t-butylphosphinomethyl)pyridine to give crystallographically characterized Ir(PNP)*(I)2, which reacts with H2 to give Ir(PNP)(H)(I)2. Ir(PNP)(Cl)3 is relatively inert towards the intramolecular CâH activation of the tert-butyl's of the PNP ligand.