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The Catalytic Transformation of Ethylene Using Chromium(III) Complexes with Bidentate Nitrogen-Containing Ligands
Catalysis Letters ( IF 2.8 ) Pub Date : 2020-03-27 , DOI: 10.1007/s10562-019-03080-3
Ilya A. Babenko , Evgeniy V. Kondrashov , Igor B. Rozentsveig , Gennadiy P. Belov , Alexey I. Vilms

Abstract It has been shown that catalytic systems of the type Cr(III)/TEA/L, where Cr(III) is tris (2-ethylhexanoate)chromium(III) (Cr(EH) 3 ), tris (acetylacetone)chromium(III) (Cr(acac) 3 ); TEA is triethylaluminum; L is 2,2′-bipyridyne (bipy), 1,10-phenanthroline (Phen), N,N ′- bis -(cyclohexyl)diazabutadiene-1,3 (DCy-DABD) and N,N ′- bis -(2,6-diisopropylphenyl)diazabutadiene-1,3 (DPPh-DABD), can be employed for ethylene poly- and olygomerization at 60–80 °C and under pressure 2–3 MPa. The proton affinity of the used bidentate nitrogen-containing ligands is evaluated using quantum chemical calculations. The DCy-DABD, which has the lowest basicity, turns out to be the best ligand for the selective di- and trimerization of ethylene. Graphic Abstract

中文翻译:

含二齿含氮配体的三价铬配合物催化转化乙烯

摘要 已表明 Cr(III)/TEA/L 型催化体系,其中 Cr(III) 是三(2-乙基己酸)铬(III)(Cr(EH) 3 )、三(乙酰丙酮)铬( III) (Cr(acac) 3 );TEA是三乙基铝;L是2,2'-联吡啶(bipy)、1,10-菲咯啉(Phen)、N,N'-双-(环己基)二氮杂丁二烯-1,3(DCy-DABD)和N,N'-双-( 2,6-二异丙基苯基)二氮杂丁二烯-1,3(DPPh-DABD)可用于在 60–80 °C 和 2–3 MPa 压力下进行乙烯聚合和低聚。使用量子化学计算评估所用双齿含氮配体的质子亲和力。DCy-DABD 具有最低的碱性,结果证明是乙烯选择性二聚和三聚的最佳配体。图形摘要
更新日期:2020-03-27
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