文献类型：期刊文献

英文题名：Synthesis and characterization of nitrogen-functionalized cyclopentadienylehromium complexes and their use as catalysts for olefin polymerization

作者：Zhang, H; Ma, J; Qian, YL; Huang, JL

机构：[1]E China Univ Sci & Technol, Organomet Chem Lab, Shanghai 200237, Peoples R China

年份：2004

卷号：23

期号：24

起止页码：5681

外文期刊名：ORGANOMETALLICS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000225181300006)，CCR-EXPANDED(收录号:WOS:000225181300006)】；

语种：英文

摘要：A series of nitrogen-functionalized cyclopentadienylchromium complexes (1-9) have been synthesized, characterized, and then tested as catalyst precursors for olefin polymerization. The structures of complexes 1 and 5 show the nitrogen atom coordinated to the chromium atom, which is confirmed by X-ray crystallography. In the presence of MAO, the complexes exhibited high catalytic activities for the homopolymerization of ethylene and its copolymerization with 1-hexene. It also turned out that both the activity of ethylene polymerization and the incorporation of 1-hexene into the copolymer were highly affected by the substituents on the cyclopentadienyl fragment and bridge group. The effects of temperature variation and Al/Cr ratio on catalytic activity were also studied.