Influence of the nuclearity of copper(II) chloride complexes on their activity in catalytic C-Cl bond metathesisстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Catalytic systems containing mainly mononuclear (CuCl42-) or dinuclear (Cu2Cl62-) tributylbenzylammonium chlorocuprates are prepared by adsorption on silica surfaces of different structures (Aerosil and Silokhrom). Using ESR, XANES, and electronic spectroscopy, the CuCl42- ions are shown to be reduced rapidly under conditions of C-Cl bond metathesis, whereas the dinuclear chlorocuprates are relatively stable. A correlation between the number of copper ions in the chlorocuprate anion and its catalytic activity is established: the mononuclear complexes are several times more active than their dinuclear counterparts.