Mechanistic investigation of the oxidative addition reactions between different iridium (I) cyclooctadiene ([Ir(LL′)(cod)]) complexes and iodomethane

The intrinsic mechanism of two different Ir(I) cyclooctadiene complexes [Ir(LL′)(cod)] (LL′ = 2-pyridinethiolato-N-oxide-κO-κS and N-methyl-4-methoxybenzo-thiohydroxamato-κO,κS) were investigated. High-pressure kinetics in different solvents, covering a large range of dielectric constants, was used to find a correlation between the volume of activation and the solvent properties. Volumes of activation were determined and reaction volumes calculated.