一个带有平面四坐标原子的Anti-van't Hoff/Le Bel化合物的合成和反应性
Changkai Shan1, Shicheng Dong2, Shenglai Yao1
1Metalorganics and Inorganic Materials, Department of Chemistry, Technische Universität Berlin, Straße des 17, Juni 135, Sekr. C2, 10623 Berlin, Germany.
Journal of the American Chemical Society
|March 21, 2023
概括
研究人员合成了第一个平面四坐标 (ptSi) 物种,一种双价化合物. 这一突破为有机化学开辟了新的途径,并为未来的应用提供了独特的基础.
科学领域:
- 有机金属化学
- 无机化学
- 材料科学
背景情况:
- 平面四坐标碳 (ptC) 是一种已知的合成构件.
- 实现平面四坐标 (ptSi) 仍然是化学中的一个重大挑战.
研究的目的:
- 报告第一个平面四坐标 (ptSi) 种的合成和反应性.
- 调查这种新型ptSi化合物的电子结构和化学行为.
主要方法:
- 通过与Idipp-SiI2直接反应合成一个 bis ((N-异环) 双胺连接体.
- 通过二电子还原的Si (IV) 前体进行替代合成.
- 用密度函数理论 (DFT) 计算来分析电子结构.
- 与甲基化物 (MeI) 和铜 (I) 三氧化物复合物的反应,以研究反应性.
主要成果:
- 通过化稳定第一个ptSi物种的成功合成.
- DFT计算显示 ptSi(II) 上的单一对位于3p轨道中,与其他烯不同.
- 氧化添加的MeI产生一个五坐标Si (IV) 化合物.
- 与铜复合物的反应会诱导Si-Si键裂变,Si(II) 到Si(IV) 的氧化,并形成一个铜复合物.
结论:
- 已经合成了第一种ptSi物种,扩大了的已知协调模式.
- ptSi(II) 的独特电子结构影响了它的反应性.
- 该化合物表现出新的反应,包括氧化添加和复杂的转化,包括连接体碎片化和金属复杂化.
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