一个被掩盖的双坐标 ((I) 复合体,激活C-F键
Thomas R Dugan1, Xianru Sun, Elena V Rybak-Akimova
1Department of Chemistry, University of Rochester, Rochester, New York 14627, United States.
Journal of the American Chemical Society
|July 21, 2011
概括
研究人员分离并描述了一种新型的复合物,L(tBu) Co,具有独特的连接体,使其能够作为掩盖的双坐标物种. 这种复合物是低坐标的稳定合成体,并且可以切割碳-键.
科学领域:
- 有机金属化学 有机金属化学
- 协调化学 协调化学
- 连接体设计 连接体设计
背景情况:
- 低坐标金属复合物对于催化应用至关重要.
- 庞大的配体通常用于稳定反应性金属中心.
- 了解连接体结合模式是控制反应性的关键.
研究的目的:
- 为了隔离和表征一种新型的不和复合物与一个重的β-diketiminate联结体.
- 调查不寻常的滑动结合模式及其与传统结合的相互转换.
- 为了证明这个复合物的实用性作为低坐标的合成 (I) 和其对C-F键裂解的反应性.
主要方法:
- 隔离和对L(tBu) Co复合物的完整描述.
- 动力学研究以阐明连接体异构化的机制.
- 反应性研究,包括甲的C-F键激活.
主要成果:
- 成功分离和表征了L(tBu) Co.
- 发现了一种快速相互转换的滑 κN,η(6) -arene 和传统的 κ(2) N,N' 结合模式.
- 证明L{tBu) Co作为低坐标{I}的稳定但有反应性的合成物.
- 有证据表明,复合物在甲中发生了C-F键裂变.
结论:
- 这种重的β-二甲基酸连接体使得一种"掩盖"的双坐标的物种.
- 连接物异构化是可逆的,并由易斯基协调控制.
- L(tBu) Co代表了一种有价值的新工具,用于探索低坐标化学和C-F键激活.
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