Oxidative addition of substituted benzenethiols to trans-chlorocarbonylbis(triphenyl phosphine)iridium(I)

Abstract

A series of para-substituted benzenethiols have been shown to react with trans-IrCl(CO)(Ph3P)2 to form IrHCl(SC6H1Y)(CO)(Ph3P)2 where Y = NO2, Br, Cl, F, H, CH3, and CH3O. A good correlation between the νCO vibration in the infrared spectra of these complexes and the Hammett substituent parameter, σp, was observed indicating that the νCO vibration may be used to provide a measure of the transmission of the para-substituent's electronic effect to the central iridium atom.