Iridium Pincer Complexes with an Olefin Backbone
Among the large variety of pincer complexes, those with carbon-carbon double bonds in the backbone have received little attention. Here, we report the reactions of complex (PC=CP)IrPh (3) and its derivatives with small molecules. Compound 3 readily adds CO to give the 18e adduct (PC=CP)IrPhCO (5a), which upon heating undergoes isomerization into the thermodynamically more stable isomer (PC=CP)IrCO