Abstract
New cyclopentadienyltitanium aryloxide complexes, 1-phenyl-2,3,4,5-Me4CpTi(O-2,6-iPr2-4-nBu-C6H2)Cl2 (1) and [4,4′-biphenyl-(2,3,4,5-Me4Cp)2][Ti(O-2,6-iPr2-4-nBu-C6H2)Cl2]2 (2), have been prepared by treatment of cyclopentadienyltitanium trichloride complexes [PhMe4CpTiCl3 and 4,4′-biphenyl-(Me4CpTiCl3)2] with 1 or 2 equiv of lithium salt of 2,6-di-isopropyl-4-butylphenol. Complexes 1 and 2 have been characterized by elemental analysis, 1H and 13C NMR spectroscopy. The molecular structure of 1 has been determined by single-crystal X-ray diffraction. Upon activation with iBu3Al and Ph3CB(C6F5)4, 1 and 2 both exhibit good catalytic activity for ethylene polymerization, producing polyethylene with moderate molecular weight and melting point.
Acknowledgements
This work was supported by the National Natural Science Foundation of China (No. 21004026).