镍(Ⅱ)、钯(Ⅱ)、铂(Ⅱ)-环戊基(苯基)膦配合物对丙烯二聚反应的催化性能  

CATALYTIC BEHAVIOR OF THE COMPLEXES OF Ni(II),Pd(II) AND Pt(II) WITH CYCLOPENTYL (PHENYL) PHOSPHINES FOR DIMERIZATION OF PROPENE

作　　者：李同信[1] 宋永瑞[1] 娄文阁 林秀英 

机构地区：[1]中国科学院大连化学物理研究所,大连116023

出　　处：《Chinese Journal of Catalysis》1990年第5期429-433,共5页催化学报（英文）

摘　　要：叔膦过渡金属配合物大多具有明显的催化性能.不同中心金属形成的配合物可能具有完全不同的链化行为.就烯烃聚合反应而言,许多研究表明,链增长速率常数K_P只随过渡金属不同而改变,与金属烷基化合物无关. 目前大多数均相催化烯烃二聚反应体系是由过渡金属,尤其是第Ⅷ族过渡金属组成,其中对以金属镍作为丙烯二聚反应的催化剂已进行了较广泛的研究。The catalytic activity and selectivity of Ni(Ⅱ)-, Pd(Ⅱ)- and Pt( Ⅱ )-cyclopentyl(phenyl) phosphine complexes with co-catalyst alkyl aluminium chlorides AlEtmCl3-m(m= 1,2,3) for the dimerization of pro-pene were studied. The experimental results show that (1 ) the Ni(Ⅱ) complexes exhibit very high activity under the conditions of 10℃ and 39 kPa, and Pd( Ⅱ) and Pt(Ⅱ )-complexes show no catalytic activity under the same condition, only when the temperature and the pressure are raised to 20℃ and 784.5 kPa respectively; (2 ) the catalytic activity of Ni( Ⅱ) complexes increases obviously with the increase of the number of cyclopentyl group in the phosphine ligand, but at the same time, the selectivity for propene dimer decreases; ( 3 ) the catalytic activity of co-catalyst alkyl aluminium chloride is relevant to the acidity of Lewis acid, i.e. AlEtCl2>Al2Et3Cl3>AlEt2Cl; (4) different transition metals affect obviously the distribution of the dimer products.

关 键 词：丙烯 二聚反应 配合物催化剂 

分 类 号：O623.121[理学—有机化学]