Recently progress of the catalytic system for ethylene tetramerization toward 1-octene is summarized. The structure and electronic property of PNP ligand are the mainly factors affecting the catalytic activity and the selectivity of the catalytic system. The bulk and electronic properties of N-substituented and P-substiuented groups in PNP ligand have important effect on catalytic activity and selectivity to 1-octene. The substiuent with bulkier and richer electronegativity will result in hindering further ethylene insertion, which induces lower catalytic activity and lower selectivity to 1-octene. The design and synthesis of a novel ligand is crucial to higher catalytic activity and higher selectivity to 1-octene.%简述了乙烯四聚反应制备1-辛烯催化体系的最新研究进展.指出乙烯四聚制1-辛烯催化体系中配体的结构和电子性是影响催化体系的活性和目的产物1-辛烯的选择性的主要因素.PNP配体中N取代基和P取代基的空间位阻和给电子效应都会对催化体系的活性和1-辛烯选择性产生影响.分析了由于取代基空间体积的增大和电负性的增强均使乙烯的进一步插入受阻,因而降低了催化体系的活性和1-辛烯的选择性.表明了设计合成新型的配体对提高催化体系活性和1-辛烯选择性至关重要.
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