The nature of the cation (K+ or Na+) in hydroxides affects the temperature plot of the equilibrium constant of the reaction of KOH and NaOH with 2,6-di-tert-butylphenol (ArOH) and the conversion of KOH and (or) NaOH to potassium or sodium 2,6-di-tert-butyl phenoxides, which are catalysts for the alkylation of ArOH by methyl acrylate. The kinetic method for determination of the composition of the catalyst formed from NaOH and ArOH was proposed. The nature of the cation in phenoxides ArOK or ArONa is a factor determining the kinetics of the reaction of ArOH with methyl acrylate. Two different kinetic schemes were proposed to describe the transformation of ArOH in the presence of ArONa or ArOK.
Mechanism of phenol oxidation by heterodinuclear Ni Cu bis(μ-oxo) complexes involving nucleophilic oxo groups
作者:Subrata Kundu、Enrico Miceli、Erik R. Farquhar、Kallol Ray
DOI:10.1039/c3dt52644e
日期:——
Oxidation of phenols by heterodinuclear CuIII(μ-O)2NiIII complexes containing nucleophilicoxogroups occurs by both proton coupled electron transfer (PCET) and hydrogen atom transfer (HAT) mechanisms; the exact mechanism depends on the nature of the phenol as well as the substitution pattern of the ligand bound to Cu.
含有亲核氧代基团的异双核Cu III (μ-O) 2 Ni III配合物氧化苯酚通过质子耦合电子转移 (PCET) 和氢原子转移 (HAT) 机制发生;确切的机制取决于苯酚的性质以及与 Cu 结合的配体的取代模式。