Copper—polymer complexes as catalysts for oxidative coupling reactions
1977; Science Press; Volume: 3; Issue: 1-3 Linguagem: Inglês
10.1016/0304-5102(77)80043-6
ISSN1873-3131
AutoresG. Challa, Herman Casper Meinders,
Tópico(s)Radical Photochemical Reactions
ResumoThe influence of water on the catalytic activity of binuclear copper complexes was studied at 44 °C in a mixture of 1,2-dichlorobenzene and methanol. The catalyst was derived from copper(II)chloride and N,N- dimethylbenzylamine or N,N-dimethylaminomethylated atactic polystyrene. The model reaction investigated was the oxidative coupling of ethynyl- benzene. It was found that the polymeric catalyst provides an extra protection of its catalytic copper complexes against water resulting in higher reaction rates than the low-molecular-weight catalyst. A similar stabilizing effect was found against so-called substrate inhibition. The influence of the polymeric nature of the catalyst on the concentration and stability of active copper complexes is discussed.
Referência(s)