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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 4, Number 4
BKCSDE 4(4)
April 20, 1983 

 
Title
Homogeneous Catalysis (Ⅵ). Hydride Route with Chloro Ligand Dissociation for the Hydrogenation of Acrylonitrile with trans-Chlorocarbonylbis(triphenylphosphine)iridium(Ⅰ)
Author
Chi Jang Moon, Chong Shik Chin
Keywords
Abstract
The reaction of IrClH2(CO)(Ph3P)2 (Ph3P = triphenylphosphine) with acrylonitrile (AN) produces a stoichiometric amount of propionitrile (PN) at 100℃ under nitrogen, which suggests that the catalytic hydrogenation of AN to PN with IrCl(CO)(Ph3P)2 proceeds through the hydride route where the formation of the dihydrido complex, IrClH2(CO)(Ph3P)2 is the initial step. The rate of the hydrogenation of AN to PN with IrCl(CO)(Ph3P)2 is decreased by the presence of excess Cl- in the reaction system, which suggests that Cl- is the dissociating ligand in the catalytic cycle. It has been also found that the rate of the hydrogenation increases with inercase both in hydrogen pressure and in concentration of free Ph3P, and with decrease in AN concentration in the reaction system.
Page
180 - 183
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