Quantitative kinetic investigation on transmetalation of ArZnX in a Pd-catalysed oxidative coupling†
Abstract
Transmetalation is the rate-limiting step. [R–Pd–Ar] was suggested to be the resting species from the kinetic studies. Quantitative measurement of the transmetalation of ArZnCl with [R–Pd–Ar] from a live Pd-catalysed oxidative coupling reaction was conducted and the corresponding activation enthalpy was determined as 12.3 kcal mol−1.