| abstract |
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:n - (a) vanadium oxychloride (VOCl 3 ), 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] [AlCl 4 ] - ; - (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. |