The [PN] and [NPN] Ligands with a dibenzophosphole backbone were investigated in titanium and zirconium complexes for their roles in 1-octene polymerization. The [NPN]-Zr complex showed low activity toward 1-octene. In contrast, [PN]-ligated complexes demonstrated catalytic activity for 1-octene polymerization, with the [PN]-Zr and [PN]2Zr complexes producing oligomers at 70 °C and the [PN]2Ti complex yielding isotactic-rich polyoctene ([mm] = 66%) at −20 °C. These results highlight the critical role of ligand design in tuning polymerization activity and stereoselectivity, advancing the development of α-olefin polymerization catalysts.
- Jin Iwasaki
- Yuzuki Kasahara
- Katsuhiko Takenaka
