含有CrPCr片段的-兰化物复合物:合成,表征和计算研究
Mikhail Yu Afonin1, Anastasiia Yu Konokhova1, Alexey A Dmitriev2
1Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk 630090, Russia.
Inorganic chemistry
|June 22, 2023
概括
合成了含有 (兰他,) 和的新型异金属复合物. 这些化合物具有独特的结构和电子特性,由量子化学计算解释,揭示了-双键的作用.
科学领域:
- 有机金属化学 有机金属化学
- 无机化学 无机化学
- 材料科学 材料科学 材料科学
背景情况:
- 新型异金属复合物的合成和表征对于理解复杂的结合和电子结构至关重要.
- 兰化物和过渡金属复合物由于其独特的电子和磁性特性,提供了多样化的应用.
研究的目的:
- 合成和描述新型异金属复合物,其中包括和元素.
- 阐明这些新化合物的结构多样性和电子特性,特别是观察到的31P NMR转移的起源.
主要方法:
- 通过反应合成异金属复合物,其中包括兰坦化前体和独特的P2-桥梁复合物.
- 使用单晶X射线衍射分析进行结构性表征.
- 光谱分析 (31P NMR) 和量子化学计算,以了解电子结构和化学变化.
主要成果:
- 成功合成了Yb (1),Sm (2) 和Y (3) 的异金属复合物[Cp*2Ln(μ-CO) 2{Cr2(μ-P) Cp2(CO) 2}.
- 确定了化合物1-3的分子和聚合物结构,揭示了与Ln3+离子相关的独特{((CO) 2CpCrPCrCp ((CO) 2) }-单元.
- 在31P NMR中观察到显著的下场转移,由量子化学计算归因于CrP双键的异构效应.
结论:
- 该研究报告了新型异金属化复合物的成功合成和结构阐明.
- 独特的电子结构,特别是高下场31P NMR转移,可以通过CrP双键的异构效应来解释.
- 这些发现有助于理解复杂有机金属系统中的结合和电子特性.
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