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Isolating Free Carbenes, their Mixed Dimers and Organic Radicals
Published on: April 19, 2019
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碳稳定Si2H2的结构可以用坐标键和古典双键来描述
Chandrajeet Mohapatra1, Subrata Kundu1, Alexander N Paesch1
1Institut für Anorganische Chemie, Universität Göttingen , Tammannstrasse 4, 37077 Göttingen, Germany.
Journal of the American Chemical Society
|August 6, 2016
概括
研究人员合成并描述了第一个由循环氨基 (cAACs) 稳定的二氧化 (Si2H2) 的分子形式. 这些发现为化物化学和结构提供了新的见解.
科学领域:
- 有机化学
- 主组元素化学
- 碳稳定
背景情况:
- 化物是化学中的基本化合物.
- 在分子形式中分离像Si2H2这样的小,不和集群,会带来重大的合成挑战.
- 循环氨基 (cAAC) 是活性主群物种的强效稳定配体.
研究的目的:
- 合成和描述二 (Si2H2) 的第一个分子样本.
- 通过实验和理论方法研究cAAC稳定Si2H2的结构和电子特性.
- 探索Si2H2核心中的结合性.
主要方法:
- 通过减少三西兰 (HSiCl3) 合成,使用石墨 (KC8) 在cAAC配体的存在下.
- 使用单晶X射线衍射,电喷离子质谱 (ESI-MS) 和核磁共振 (NMR) 光谱 (1H和29Si) 的表征.
- 使用计算方法分析稳定Si2H2的结构的理论研究.
主要成果:
- 在室温下对两个分子化合物 (Me-cAAC:) 2Si2H2和 (Cy-cAAC:) 2Si2H2) 的隔离和完整表征.
- 单晶X射线衍射为这些Si2H2复合物提供了最终的结构数据.
- 光谱数据 (ESI-MS,1H NMR,29Si NMR) 证实了这些化合物的组成和完整性.
- 理论分析表明Si2H2核心的双键描述与2,3-disila-1,3-butadiene结构中的坐标键和经典双键一致.
结论:
- 通过cAAC配体稳定分子Si2H2的成功分离代表了化学的重大进步.
- 这项研究提供了Si2H2的第一个结晶学特征分子示例.
- 这些发现突显了cAAC配体在稳定反应性低价值物种方面的有效性,并为-结合提供了新的视角.
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