十甲基泰坦酸盐的结构,一种具有两个光学C-h键的金属,以及它与碳化合物的相互作用
Marco W Bouwkamp1, Jeanette de Wolf, Isabel del Hierro Morales
1Center for Catalytic Olefin Polymerization, Stratingh Institute for Chemistry and Chemical Engineering, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands.
十甲基泰坦二烯四甲基酸盐表现出独特的反应性,与THF和基一起形成添加物. 它与三托烯和某些化酸盐离子进行C-F键激活,产生二化.
科学领域:
- 有机金属化学 有机金属化学
- 泰坦时代的化学结构
- 酸盐阳离子化学 酸盐阳离子化学
背景情况:
- 十甲基泰坦复合物是多功能有机金属化合物.
- 甲酸离子是协调化学中常见的对子离子.
- 了解酸的反应性对于催化和材料科学至关重要.
研究的目的:
- 为了合成和描述十甲基酸盐的四甲基酸盐,[Cp*2Ti][BPh4].
- 为了研究这个复合体与各种配体和化合物的反应性.
- 探索反离子在酸复合物的反应性中的作用.
主要方法:
- 通过涉及Cp*2TiH和Cp*2TiMe的反应合成[Cp*2Ti][BPh4].
- 确定泰坦酸盐及其酸添加物的晶体结构.
- 涉及THF,甲,α,α,α,α-trifluorotoluene和化酸盐离子的反应性研究.
主要成果:
- [Cp*2Ti][BPh4]的晶体结构显示出一个曲的金属基结构,具有敏的相互作用.
- 观察并描述了THF和eta1-fluorobenzene的吸管形成.
- 与alpha,alpha,alpha-trifluorotoluene和特定的化酸离子发生了C-F键激活,导致Cp*2TiF2的形成.
结论:
- 十甲基酸盐离子很容易与易斯基和pi系统形成 adducts.
- 该综合体表现出选择性的C-F债券激活,特别是基C-F债券.
- 化反离子的性质显著影响了泰坦复合物的反应性.
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