Synthesis,characterization and ethylene oligomerization and polymerization of 2-(1H-2-benzimidazolyl)-6-(1-(arylimino)ethyl)pyridylchromium chlorides |
| |
Authors: | Liwei Xiao Min Zhang Wen-Hua Sun |
| |
Affiliation: | 1. Department of Chemistry, Langfang Teacher’s College, Langfang 065000, China;2. Key Laboratory of Engineering Plastics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China |
| |
Abstract: | A series of N^N^N tridentate chromium complexes (C1–C6) bearing 2-(1H-2-benzimidazolyl)-6-(1-(arylimino)ethyl)pyridine derivatives was synthesized and characterized by elemental and spectroscopic analysis along with single-crystal X-ray crystallography. X-ray crystallographic analyses reveal chromium complex C1 as a distorted six-coordinated octahedral geometry. On treatment with modified methylaluminoxane (MMAO), the chromium complexes exhibited high activities for ethylene oligomerization (up to 1.50 × 106 g mol−1 (Cr) h−1) and polymerization (up to 2.06 × 106 g mol−1 (Cr) h−1) at 10 atm ethylene pressure. Various reaction parameters were investigated in detail, and less steric hindrance and electron-withdrawing substituents of ligands enhance the catalytic activities of their chromium complexes. |
| |
Keywords: | Chromium complex N^N^N tridentate ligand Ethylene oligomerization Ethylene polymerization |
本文献已被 ScienceDirect 等数据库收录! |
|