Ethylene/1,3‐Cyclohexadiene Copolymerization by Means of Methylaluminoxane Activated Half‐Sandwich Complexes

Ethylene copolymerization with 1,3-cyclohexadiene (CHD) was investigated by using methylaluminoxane (MAO) activated single-site catalysts including bridged and non-bridged titanium half-sandwich and bimetallic cobalt(I) complexes. MAO activated cpTiCl 2 [N=P( t Bu) 3 ] (Cp = cyclopentadienyl, t Bu = tert-butyl) gave high molecular weight CHD copolymers without encountering catalyst activity losses. According to the NMR microstructure investigation the resulting copolymers are highly regioregular.