Département de chimie moléculaire

(P,C)-cyclometalated Au(III) complexes have shown remarkable ability to catalyze the intermolecular hydroarylation of alkynes. An outer-sphere mechanism has been evidenced in a previous study and is confirmed here, by consideration of experimental data and DFT calculations. In this work, we propose an evaluation of critical energies of dissociation of the Au(III) complexes with different substrates, via Energy Resolved Mass Spectrometry (ERMS) experiments and kinetic modelling. The kinetic model is based on a multi-collisional approach. On one hand, the classification confirms the mechanism previously proposed, on the other hand it supports the collisional model and its application to particularly fragile adducts.