通过四个捐赠体连接体稳定循环C4:对 (L) 4C4 (L = Carbene) 的理论研究
Chengxiang Ding1, Sudip Pan1, Gai-Ru Yan1
1Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, China.
The journal of physical chemistry. A
|October 26, 2023
概括
量子化学研究表明, (L) 4C4复合体与SNHC和NHC等特定带是稳定的,并且类似于 [4]放射结构. 碳联体上较大的替代剂增强了对解离的复合稳定性.
科学领域:
- 量子化学 是一个量子化学.
- 材料科学 材料科学 材料科学
- 计算化学计算化学
背景情况:
- 目前正在研究四碳化合物复合物与各种碳联体 (L) 4C4的稳定性和实验可行性.
- 了解解离路径对于合成和利用这些新型复合体至关重要.
研究的目的:
- 用量子化学方法研究 (L) 4C4复合物的稳定性.
- 根据这些复合物的计算性质,评估这些复合物的实验实现潜力.
主要方法:
- 使用密度函数理论 (DFT) 的计算.
- 对解离能量的分析,亚底离子电离潜力和结合特性.
主要成果:
- 有cAAC和DAC连接体的复合物是不稳定的,在室温下分离成 (L) 2C2单元.
- 具有NHC,SNHC,MIC1和MIC2配体的复合体具有显著的热化学稳定性.
- 鉴于SNHC和NHC连接体是有希望的,可以用于实验合成.
- 对NHC,MIC1和MIC2复合物的计算电离潜力低于的电离潜力,这表明电子损失很容易.
- 结合分析揭示了具有强大的西格玛和π组件的 [4]放射类结构.
- 碳联体上增加的硬质量增加了复合体的稳定性.
结论:
- (L) 4C4复合物的稳定性高度依赖于碳联体 (L) 的性质.
- 在实验中,SNHC和NHC配体为稳定 (L) 4C4复合体的合成提供了最好的前景.
- 这些复合物的电子特性和结合性与 [4] 放射相似,表明它们具有独特的化学行为.
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