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平面四坐标 (ptSi):含有Anti-van't Hoff/Le Bel的室温稳定化合物
Priyabrata Ghana1, Jens Rump1, Gregor Schnakenburg1
1Institute of Inorganic Chemistry, University of Bonn, Gerhard-Domagk-Straße 1, D-53121 Bonn, Germany.
Journal of the American Chemical Society
|December 21, 2020
概括
研究人员合成了具有平面四坐标 (ptSi) 与平面四坐标碳 (ptC) 原子的稳定复合物. 这一发现有助于我们更好地理解化学中的异常结合.
科学领域:
- 有机金属化学
- 化学
- 协调化学
背景情况:
- 已知平面四坐标碳 (ptC),但稳定的平面四坐标 (ptSi) 是罕见的.
- 在异常的结合模式下稳定是无机化学的一个关键挑战.
研究的目的:
- 合成和描述含有 ptSi 原子的新型稳定复合物.
- 调查稳定ptSi几何的电子和结构因素.
主要方法:
- 通过金属酸复合物的与酸的反应合成新的有机金属复合物.
- 使用实验技术进行全面的表征 (例如光谱,X射线衍射).
- 量子化学计算以阐明电子结构和结合.
主要成果:
- 热稳定复合物的成功合成,其一般公式是[Tp'(CO) 2MSiC(R1) C(R2) M(CO) 2Tp' (M = Mo,W).
- 这些复合物包含一个独特的三环状形核心中的 ptSi 和两个 ptC 原子.
- 电子结构分析显示 ptSi 通过中央 SiC2 环中的芳香度稳定.
结论:
- 证明了在离散分子复合体中稳定ptSi中心的可行性.
- 突出了过渡金属和有机配体之间的相互作用,以实现不寻常的几何形状.
- 这项研究提供了对低坐标化学及其新应用潜力的新见解.
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