时间的玫瑰
1H and 2H NMR Spectroscopic Characterization of Heterobinuclear Ion Pairs Formed upon the Activation of Bis(imino)pyridine Vanadium(III) Precatalysts with AlMe3/[Ph3C]+[B(C6F5)4]− and
MAO
期刊名称： Organometallics
作者： Igor E. Soshnikov,Nina V. Semikolenova,Artem A. Antonov,Konstantin P.土豆片怎么炸
祭奠怎么读Bryliakov,Evgenii P. Talsi
小说三要素年份： 2014年南沙湿地公园
期号： 第10期
什么是b2b摘要：Until recently, attempts to characterize vanadium(III) species formed upon the activation of vanadium(III) α-olefin polymerization precatalysts with
AlMe3/[Ph3C]+[B(C6F5)]4– or MAO were unsuccessful. In this contribution, 1H and
2H NMR spectroscopy was ud to study the activation of bis(imino)pyridine vanadium(III) chloride LVIIICl3 {L = [2,6-(ArN═CMe)2C5H3N], Ar = 2,6-iPr2C6H3; 2,6-Me2C6H3; 2,4,6-Me3C6H2; 3,5-F2C6H3} with AlMe3/[Ph3C]+[B(C6F5)]4– or MAO. Formation of heterobinuclear ion pairs of the type [L(R)VIII(μ-R)2AlMe2]+[A] ([A]– = [B(C6F5)]4– or [MeMAO], R = Me or Cl) was obrved, which are the most likely direct precursors of active sites of ethylene polymerization.
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