Polymerization of 1-hexene, 1-octene catalyzed by Cp′TiCl2(O-2,6-iPr2C6H3)–MAO system. Unexpected increase of the catalytic activity for ethylene/1-hexene copolymerization by (1,3-tBu2C5H3)TiCl2(O-2,6-iPr2C6H3)–MAO catalyst system

Although (1,3-tBu2C5H3)TiCl2(O-2,6-iPr2C6H3) (4) showed the lowest catalytic activity for polymerization of 1-hexene, 1-octene with the series of Cp′TiCl2(O-2,6-iPr2C6H3) [Cp′= Cp, tBuC5H4, 1,3-Me2C5H3, 1,3-tBu2C5H3, and C5Me5]–methylaluminoxane (MAO) catalysts, 4 exhibited the significant catalytic activity for copolymerization of ethylene with 1-hexene, resulting in obtaining a copolymer with relatively high 1-hexene content (20.2–36.5 mol%) with relatively narrow molecular weight distribution.