Arene complexes of Ni (II) efficient catalysts for 1,3- butadiene and styrene polymerization

A simple procedure for the preparation of cationic arene complexes of Ni(II) of composition [Ni(h6-ArX)(h3- C3H5)]+[BArA4]2 (X = OH, H) is reported. These compounds are shown to behave as highly active catalysts for the polymerization of 1,3-butadiene and styrene.