中文摘要：

通过胺基锂盐分离的方法合成了一种未有报道过的N-四氢糠基PNP配体E.E分别与Cr Cl3（THF）3和Cr（CO）6反应生成化合物[{Ph2PN（CH2OC4H7）PPh2}Cr Cl2（μ-Cl）]2（1）和[Ph2PN（CH2OC4H7）PPh2]Cr（CO）4（2）.这三个化合物通过谱学和元素分析表征,化合物2进一步经过X射线单晶结构确认.在甲基铝氧烷（MAO）或其它助剂作用下,考察了1、2以及E/Cr Cl3（THF）3、E/Cr（acac）3、E/Cr Cl2（THF）2催化体系催化乙烯齐聚的性能.这些体系高选择性地催化乙烯四聚,最高活性为15.9 kg（product）/g（Cr）·h,1-辛烯的选择性最高可达63.6%.

英文摘要：

The N-tetrahydrofurfuryl diphoshinoamine（PNP） ligand（E） was synthesized by means of two-step salt elimination reactions where separation of the two kinds of the aminyl lithium salts for the respective reactions is necessary for obtaining a high yield of E. The ligand reacted with Cr Cl3（THF）3 and Cr（CO）6 to give P,P-chelation complexes [{Ph2PN（CH2OC4H7）-PPh2}Cr Cl2（μ-Cl）]2（1） and [Ph2PN（CH2OC4H7）PPh2]Cr（CO）4（2）, respectively. Complexes E, 1 and 2 were characterized by spectroscopy and elemental analysis, of which complex 2 was further confirmed by X-ray crystallography. Upon activation with methylaluminoxane（MAO） or Al Et3, the catalyst systems including 1, 2, E/Cr Cl3（THF）3, E/Cr（acac）3 and E/Cr Cl2（THF）2were investigated. The best catalytic activity was achieved by 15.9 kg（product）/g（Cr）·h in which a selectivity of 63.6% for 1-C8 was obtained.