The effect of the central donor in bis(benzimidazole)-based cobalt catalysts for the selective cis-1,4-polymerisation of butadiene
作者:Renan Cariou、Juan J. Chirinos、Vernon C. Gibson、Grant Jacobsen、Atanas K. Tomov、George J. P. Britovsek、Andrew J. P. White
DOI:10.1039/c0dt00402b
日期:——
of bis(benzimidazole)-based cobalt(II) dichloride complexes containing a range of different central donors has been synthesized and characterized. The nature of the central donor affects the binding of the ligand to the cobalt centre and determines the coordination geometry of the metal complexes. All complexes have been shown to catalyse the polymerization of butadiene, in combination with MAO as
一系列 双(苯并咪唑)-基于 二氯化钴已经合成并表征了包含一系列不同中央供体的复合物。中心给体的性质影响配体与钴中心的结合并确定金属配合物的配位几何形状。已证明所有配合物都可与丁二烯一起催化丁二烯的聚合。毛 作为助催化剂, 顺式-1,4-聚丁二烯具有高选择性。中心给体的性质对催化剂的聚合活性有显着影响,但不影响聚合物的微观结构。的加法PPh 3 通常会提高这些聚合物的聚合活性 钴 催化剂和结果主要(60–70%) 1,2-乙烯基-聚丁二烯。