Vanadium (IV) compounds soluble in organic media, process for their preparation and their uses

摘要

A compound of tetravalent vanadium of the general formula IMAGE wherein M represents a metal of the fourth group of the Periodic Table of the Elements and R represents and alkyl, cycloalkyl or aryl moiety of 1 to 20 carbon atoms and a process for its preparation. Also disclosed is the use of such vanadium compound as a catalyst for homopolymerization, copolymerization or terpolymerization of various monomers including olefins and vinyl monomers.