Dicationic ruthenium(II) complexes containing bridged η1:η6-phosphinoarene ligands for the ring-opening metathesis polymerization
作者:Alexandra Abele、Roland Wursche、Martti Klinga、Bernhard Rieger
DOI:10.1016/s1381-1169(00)00229-6
日期:2000.10
sodium salt NaB(Arf)4(Arf=3,5-(CF3)2C6H3) and methanol (C). The influence of the thereby created differing number of accessible coordination sites on the polymerization activity and the polymer microstructure (cis/trans ratio) was investigated. The nucleophilicity of the counter ion was found to play a crucial role in terms of catalytic activity.
具有侧挂芳烃叔膦- [R 2 PR'(R = CY,Ph值; R'= CH 2 CH 2 PH或CH 2 CHPh配合2)(1 - 4)的合成,并转换为相应的螯合钌(II)络合物将[RuCl 2(η 1:η 6 -R 2 PR')](1A -图4a)。卤化物交换得到[锐2(η 1:η 6 -R 2 PR')](1B,3B),其被结构特征在于单晶X射线衍射。系统(通过添加重氮化合物(三甲基甲硅烷基重氮甲烷)和AgBF 4(A),单独使用重氮化合物(B)或通过钠盐NaB(Ar f)4的组合,激活1a,2a,4a)的降冰片烯的ROMP。(Ar f= 3,5-(CF 3)2 C 6 H 3)和甲醇(C)。由此产生的不同数量可及的配位点对聚合活性和聚合物微观结构的影响(顺/反比率)进行了调查。发现抗衡离子的亲核性在催化活性方面起着至关重要的作用。