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Platinum-Catalyzed Phenyl and Methyl Group Transfer from Tin to Iridium:  Evidence for an Autocatalytic Reaction Pathway with an Unusual Preference for Methyl Transfer

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journal contribution
posted on 13.02.2008, 00:00 by Stuart E. Smith, Jennifer M. Sasaki, Robert G. Bergman, Joseph E. Mondloch, Richard G. Finke
Platinum complexes have been found to catalyze the transfer of σ-bound ligands to the Ir center in Cp*(PMe3)IrCl2 (Cp* = η5-C5Me5) from Bu3SnPh and PhxSnMe4-x (x = 0−3) complexes. Despite the presence of Sn−Ph bonds in the PhxSnMe4-x complexes, exclusive transfer of the Sn−Me group occurs, an unusual chemoselective process. Examination of the reaction mechanism supports an autocatalytic process.