Low‐Temperature Polymerization of Olefins in the Presence of Titanium Monoamidinate/MAO Catalyst

This paper reports the predominantly syndiotactic‐specific polymerization of propylene in the presence of titanium monoamidinate/methylaluminoxane (MAO) catalysts. The same catalysts, depending on the reaction conditions, also promote either predominantly 1,4‐ cis or 1,4‐ trans polymerization of 1,3‐butadiene and polymerization of styrene either to highly syndiotactic or to stereoirregular polymer. Some preliminary information about the features of propylene polyinsertion is also reported. Expansion of the 20–24 ppm region of the 13 C NMR spectrum of sample 2. The starred resonance at 21.75 ppm and the shoulders are not assigned. magnified image Expansion of the 20–24 ppm region of the 13 C NMR spectrum of sample 2. The starred resonance at 21.75 ppm and the shoulders are not assigned.