A series of group 10 complexes, [SN(H)S]M(PPh3) [M = Ni, Pd, Pt], with the redox active, 4-(2-mercaptotoluidino)-3-toluenethiol) [SNS] ligand, were prepared and characterized. Thermochemical and kinetic studies were conducted to determine the impact of the metal ion on the hydrogen atom transfer (HAT) reactivity of these complexes. Equilibrium measurements determined from spectrophotometric titrations were used to determine the bond dissociation free energy (BDFE) of these complexes. These values were also determined using the pKa (N-H) and Eo¢ in the Bordwell equation as well as from kinetic data (k1/k-1). These studies have shown that changing the metal center has a measurable influence on the BDFE and the HAT reactivity for this series.

Measuring the influence of metal ion on hydrogen atom reactivity in a series of group 10 complexes with a proton and redox non-innocent ligand

2019 Fall National Meeting

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