Comparison of the process of deactivation of homogeneous catalysts by the example of copper(II) compounds in the presence of some additives in various solvents

For a model reaction of tetralylhydroperoxide decomposition, kinetic data for evaluating the catalytic activity of Cu(II) complexes in solvents of different natures were obtained. The experiments were performed using chlorobenzene (aprotic solvent), ethanol (capable of forming intermolecular hydrogen bonds), and ethyl acetate (having no movable proton). The passivation of the catalysts in the presence of benzoic acid and N,N'-bis(o-hydroxybenzoyl) hydrazine (inhibitor) in these solvents was studied. It was found that the tested additives produce different effects on the catalytic activity of the initial and reaction-modified forms of Cu(II).