β-二酮镍-烷基铝催化丙烯线性齐聚反应的研究

研究了用 Ni(acac)_2(2,4-戊二酮镍)或 Ni(dPP)_2(1,3-二苯基-1,3-丙二酮镍)/烷基铝均(?)催化体系进行的丙烯齐聚反应。用一系列 Et_2AIY 型的烷基铝(Y=((?)-C_6H_(12))_2N—、C_2H_5O—、n-C_4H_9O—、n-C_(?)H_(11)CO_2—、C_6H_5CO_2—等)作助催化剂时,发现催化剂活性与 Y 的电负性有关,而且只有当 HY 的酸性与β-二酮配体的酸性相适应时,催化剂才有离活性。

Study of Linear Oligomerization of Propylene Catalyzed by Nickel β-diketonate and Aluminium Alkyls

Oligomerization of propylene has been studied using the homogeneous catalystsystems consisting of nickel 2,4-pentadionate,nickal 1,3-diphenyl-1,3-propadion/ateorganoaluminium compounds.A series of organoaluminium compounds ofthe type Et_2AlY(where Y=(n-C_6H_(13))_2N—,C_2H_5O—,n-C_4H_8O—,n-C_5H_(11)CO_2—,etc.)were employed as cocatalysts.It was found that the catalyst activity was relatedwith the electronegativity of Y.The catalyst activity was high only when theLewis acidity of HY suited the acidity of β-diketone.