Procedure for the producing of vanadium bis-arenes from vanadium oxychloride.

摘要

A procedure is described for the preparation of vanadium bis-arene, [V(arene)2], starting from vanadium oxychloride, aluminium metal, aluminium trichloride and an arene, wherein: (a) vanadium oxychloride (VOCl3), active aluminium metal, and aluminium trichloride are put in contact with each other, in a liquid arene, to transform the vanadium oxychloride into the complex compound [V(arene)2]<+> [AlCl4]<->; (b) a liquid cyclic or acyclic ether is added to the reaction product of step (a) to reduce [V(arene)2]<+> to [V(arene)2]; and (c) the vanadium bis-arene [V(arene)2] is recovered from the reaction product of step (b). The vanadium bis-arenes thus obtained are used in the preparation of catalysts for the polymerisation of olefins.