在和化的异金属复合体中,铁促进了终端二桥接
Nadir Jori1, Juan J Moreno1,2, R A Keerthi Shivaraam1
1Institut des Sciences et Ingénierie Chimiques, École Polytechnique Fédérale de Lausanne (EPFL) 1015 Lausanne Switzerland marinella.mazzanti@epfl.ch.
Chemical science
|May 10, 2024
概括
这项研究报告了前所未有的异金属末端桥复合体的合成,其中包括和化物. 这些复合物作为二降解催化剂的模型.
科学领域:
- 无机化学 无机化学
- 有机金属化学 有机金属化学
- 兰化物化学 兰化物化学
- 化学 的化学
背景情况:
- 对二 (N2) 与金属中心的末端结合在过渡金属中很常见,但在f元素中很少见.
- 兰坦化的异金属末端N2桥接复合体是前所未有的.
- 这些复合物在二的催化还原中具有潜在的相关性.
研究的目的:
- 合成和表征U(iii),Ln(iii) 和Ln(ii) 的新型末端N2桥接异金属复合体.
- 为了探索f元素与二的反应性.
- 为二降解中间体提供结构模型.
主要方法:
- 合成异金属复合物通过对铁二复合物[Fe (深) 2N2) ]与金属胺前体 ([MIII{N(SiMe3) 2}3和[LnII{N(SiMe3) 2) 的反应).
- 合成复合物的表征.
- 计算研究 (密度函数理论) 调查结合相互作用和电子结构.
主要成果:
- 成功合成了前所未有的与铁结合的U (iii),Ln (iii) 和Ln (ii) 的N2复合体.
- 隔离了双价兰坦化物的新型端接桥接N2复合体.
- 计算研究揭示了Ln复合体的静电相互作用,以及U (iii) 复合体的背键共价贡献.
- 对于兰化物复合体,N2激活与易斯酸度相关.
- 与自由N相比,对结合铁的N2有利于N2的末端结合,这是由于较高的两极化.
结论:
- 该研究报告了第一个涉及f元素的N2复合体端到端桥梁的例子.
- 合成的复合物作为二降解催化过程中中间体的有价值的结构模型.
- 计算洞察力阐明了金属-N2相互作用的性质和影响N2激活的因素.
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