Chemistry Letters, Vol.31, No.7, 740-741, 2002
Zirconium complexes having phenoxy/cycloalkylimine chelate ligands for the polymerization of ethylene for vinyl-terminated low molecular weight polyethylenes
Zirconium complexes bearing phenoxy/cyclopropyl-, cyclobutyl- or cyclopentyl-imine chelate ligands, when activated with methylalumoxane (MAO), produced vinyl-terminated low molecular weight polyethylenes (M-w < 5000) with higher activities than Cp2ZrCl2 at 25 degreesC. The complex having a cyclobutyl group provided the lowest molecular weight polyethylene (M-w 2100).