固体/气体 在晶体中 一个Ir(I) 甲基利丁复合物的反应性
Kristof M Altus1, M Arif Sajjad2, Matthew R Gyton1
1Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K.
Organometallics
|December 30, 2024
概括
这项研究稳定了甲基复合物的单晶反应性. 该复合物与H2,CO和NH3发生反应,证明了{Ir=CH2}组的独特固体/气体转化.
科学领域:
- 有机金属化学 有机金属化学
- 固态化学 固态化学
- 催化剂是一种催化剂.
背景情况:
- 甲基乙烯复合物是有机金属化学中的关键中间体,但在溶液中往往不稳定.
- 稳定这些反应性物种是了解它们的基本反应性和催化潜力的关键.
研究的目的:
- 使用*in crystallo*方法稳定一种已知但溶液不稳定的甲基复合物.
- 为了研究稳定{Ir=CH2}组的单晶到单晶固体/气体反应性.
- 用计算方法阐明反应机制.
主要方法:
- 单晶X射线衍射用于*在晶体*中的稳定性和反应性研究.
- 单晶体暴露在各种气体 (H2,CO,NH3) 中,以监测固态转化.
- 周期密度函数理论 (DFT) 和电子结构计算.
主要成果:
- 甲基复合物[Ir(tBu-PONOP) (((=CH2)][BArF4]在固态中成功稳定.
- 单晶对单晶与H2,CO和NH3的反应产生了不同的产物:分别是二化物,碳基和甲基胺复合物.
- DFT的计算证实了Ir=CH2的结合特性,并揭示了低的旋转障碍,NH3的添加通过氨基和氨基碳中间体进行.
结论:
- *In crystallo*稳定使得以前无法获得的不稳定的甲基利丁复合物的固体/气体反应性的研究成为可能.
- 观察到的反应凸显了{Ir=CH2}部分在经历小分子转换时的多功能性.
- 计算分析提供了详细的机械洞察力,了解NH3添加的甲基胺产品的形成.
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