在三烯和相关的重烯中异常结合
Mitsuo Kira1, Takeaki Iwamoto, Shintaro Ishida
1Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai, 980-8578, Japan. mkira@mail.tains.tohoku.ac.jp
Journal of the American Chemical Society
|November 12, 2009
概括
研究人员探索了具有独特结合性的重,和化合物. 他们发现Jahn-Teller扭曲解释了它们的曲结构,为重元素化学提供了洞察力.
科学领域:
- 有机金属化学 有机金属化学
- 无机化学 无机化学 有机化学
- 计算化学计算化学
背景情况:
- 艾伦化学通常涉及较轻的元素.
- 沉重的14组元素 (,) 具有独特的结合特性.
- 了解重烯的结构和电子性质对于推进主要组化学至关重要.
研究的目的:
- 为了比较分析重烯的合成,结构和结合.
- 阐明这些化合物的不寻常的曲和流动性质的起源.
- 建立一个理论框架,以了解不和重型主要组元素的结合.
主要方法:
- 重型烯的合成和表征 (Si=Si,Si=Ge,Ge=Si,Ge=Ge).
- 进行X射线衍射和光谱分析.
- 密度函数理论 (DFT) 的计算和边界分子轨道 (PMO) 理论.
主要成果:
- 详细的结构和光谱数据获得了各种重型烯.
- 由pi-sigma*混合驱动的Jahn-Teller扭曲被确定为曲骨的原因.
- pi-sigma* 扭曲的概念为不寻常的结合提供了定性解释.
结论:
- 沉重的艾伦体具有独特的结合和结构特征.
- 雅恩-泰勒扭曲是重型阿伦体曲和流动性质的一个关键因素.
- 对于理解不和重型主要组化合物而言,pi-sigma*扭曲概念至关重要.
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