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三甲

Damir Barisic¹, Dominic Diether¹, Cäcilia Maichle-Mössmer¹

¹Institut für Anorganische Chemie , Eberhard Karls Universität Tübingen , Auf der Morgenstelle 18 , 72076 Tübingen , Germany.

Journal of the American Chemical Society

|August 1, 2019

概括

一种新型的四甲酸复合物被合成和特征化. 这种复合物[Sc(AlMe4) 3具有独特的反应性,并作为甲基复合物和异聚合物的前体.

科学领域:

有机金属化学
协调化学
聚合物化学

背景情况:

与基连接体的复合物尚未得到充分理解.
四甲基酸配体具有独特的电子和硬质性质.
开发聚合催化剂的新前体具有重要意义.

研究的目的:

合成和描述一种新型的同质四甲胺复合物.
研究新复合物的反应和分解途径.
探索复合物作为聚合催化剂的潜力.

主要方法:

在低温下从[Li3ScMe6(thf) 1.2]和AlMe3中合成[Sc(AlMe43].
结晶和结构特征 [Sc(AlMe4) 3(Al2Me6) 0.5 .
通过C-H激活和NMR光谱 (45Sc NMR) 进行分解研究.
使用三甲基三环 (Me3TACN) 和盐转化反应的衍生.
使用化复合物作为催化剂的异聚合.

主要成果:

新型同质四甲酸复合物[Sc(AlMe4) 3已成功合成.
涉及C-H激活的分解途径导致混合的甲基/甲基复合物.
形成和表征了包括[(Me3TACN) ScMe3在内的甲基复合物.
获得了半三明治和三明治复合物,如[Cp*Sc(AlMe4) ]和[Cp*2Sc(AlMe4].
45Sc NMR光谱证实了[ScMe3]的存在,并显示了显著的脱.
化复合物催化了高产量和cis-1,4-多聚烯的异烯聚合.

结论:

[Sc(AlMe4) 3的合成扩展了已知的有机化学.
该复合体具有丰富的反应性,包括C-H激活和配体交换.
作为立体选择性异聚合物的催化剂,复合物具有前景.

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