具有多重-键的异金属集群中的电子移位和σ-芳香性
Weiming Sheng1, Thayalan Rajeshkumar2, Yue Zhao1
1State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
这项研究报告了具有多个-键的新-集群,扩大了f块金属化学知识. 这些复合物具有独特的电子特性和反应性,包括缩.
科学领域:
- 无机化学
- 有机金属化学
- 乙化物化学
背景情况:
- 与d块过渡金属相比,涉及f块活性化物,特别是的金属-金属键的研究进展较低.
- 之前识别的具有Th-TM键的过渡金属 (Th-TM) 复合物很少见,只有单键和在+IV氧化状态中的Th.
研究的目的:
- 合成和描述具有多个Th-Pd键的新型- (Th-Pd) 集群.
- 研究这些新的Th-Pd复合物的电子结构和粘合特性.
- 探索这些复合物的反应性,特别是它们在缩等化学转化中的潜力.
主要方法:
- Th2Pd (n=2,3和6) 集群的合成
- 理论研究,包括电子移位和 σ 芳香度的分析.
- 对Th (III) 复合物的最高占分子轨道 (HOMO) 的研究.
- 通过Th2Pd6集群进行缩的实验研究.
主要成果:
- 报告的新型Th2Pd集群 (复合体3,4,和7) 具有多个Th(III) -Pd键.
- 理论研究揭示了Th2Pd单元内的电子移位和σ芳香性,导致封闭单体结构.
- 复合体7显示了对基因进行2e降解的能力,形成复合体8.
- 复合体7和8是已知的最大的d-f异金属集群,其中Th2Pd6核心分别呈现六个和八个Th-Pd键.
结论:
- 有多个Th (III) -Pd键的Th2Pd集群的合成代表了f-块化学的重大进展.
- 这些复合物表现出独特的电子移位和 σ 芳香性,有助于它们的稳定性和反应性.
- 观察到的缩突出了这些大型d-f异金属集群在催化和合成转化中的潜力.
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