一个正式的Cr(-I) 双复合物的三化
Botao Wu1,2,3, Wang Chen2,4, Haihan Yan1
1Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China.
Journal of the American Chemical Society
|August 25, 2025
概括
研究人员首次在一个金属中心上实现了两个二 (N2) 配体的功能化. 在固化学领域的这一突破使得从N2合成新的含化合物成为可能.
科学领域:
- 无机化学
- 有机金属化学
- 催化剂
背景情况:
- 从二 (N2) 中直接合成含的化学物质是化学中的一个长期目标.
- 对协调N2连接体的电友性攻击是形成元素键的主要策略.
- 以前对具有多个N2连接体的金属复合体的研究通常导致N2挤出,将衍生性限制在单个N2连接体上.
研究的目的:
- 在单个金属中心实现两个二联体的同时功能化.
- 探索单核二复合物的电友功能.
- 了解双N2连接体功能化的电子结构要求.
主要方法:
- 一个由PCP-pincer连接体支持的单核形式 ((-I) bis-dinitrogen复合物的合成和表征.
- 用三甲基化物 (TMSCl) 和三甲基三酸盐 (TMSOTf) 对 bis-dinitrogen 复合物的电友处理.
- 使用高度相关的基于波函数的ab initio方法进行详细的电子结构分析.
主要成果:
- 使用TMSCl实现了两种N2联体的电化,从一个CrII) bis-diazenido中间体中产生了CrIV) 复合体.
- 与双重功能产品的比例为1:1形成了一个Cr (IV) 单化物种.
- 与TMSOTf的反应产生了Cr(III) 水复合物,表明不同的反应途径.
- 双N2功能化的关键要求是非竞争性的八电子M-(N2) 2 π回.
结论:
- 这项研究报告了在单一金属中心上成功实现两种二联体的功能.
- 这些发现为实现多重N2联体衍生提供了对电子结构先决条件的关键见解.
- 这项工作为设计能够进行更复杂的固定转换的新复合物铺平了道路.
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