Influence of the nuclearity of copper(II) chloride complexes on their activity in catalytic C-Cl bond metathesis期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Influence of the nuclearity of copper(II) chloride complexes on their activity in catalytic C-Cl bond metathesis

Authors:	E N Golubeva V I Pergushov A I Kokorin D I Kochubey V V Kriventsov N A Zubareva

Institution:	1.Faculty of Chemistry,Moscow State University,Moscow,Russia;2.Semenov Institute of Chemical Physics,Russian Academy of Sciences,Moscow,Russia;3.Boreskov Institute of Catalysis, Siberian Branch,Russian Academy of Sciences,Novosibirsk,Russia

Abstract:	Catalytic systems containing mainly mononuclear (CuCl ₄ ^2? ) or dinuclear (Cu₂Cl ₆ ^2? ) tributylbenzylammonium chlorocuprates are prepared by adsorption on silica surfaces of different structures (Aerosil and Silokhrom). Using ESR, XANES, and electronic spectroscopy, the CuCl ₄ ^2? 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.

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