초록 |
We have prepared a series of new chromium(III) complexes, LCrCl3, based on tridentate ligand HC(Pz)2Py (Pz = pyrazole; Py = pyridine) and its derivatives to explore the effects of the ligand modification on the catalytic activity and selectivity in ethylene polymerization/oligomerization. The molecular structures of the new Cr(III) precatalysts were analyzed by single-crystal X-ray diffraction to confirm an unambiguous structural determination of coordination mode. Here we describe the synthesis, characterization, and the catalytic performances of the Cr(III) complexes. |