合成,结构和溶液动力学四位置换的九原子三角面集群的九原子三角面集群
1Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States.
本研究报告了新型中性-9 (Ge9) 集群与多种替代物的合成和结构特征. 这些Ge9集群在溶液中表现出动态行为,与替代集群显示离子特征.
科学领域:
- 主要组 无机化学 无机化学
- 集群化学是一种集群化学.
- 有机金属化学 有机金属化学
背景情况:
- -9 (Ge9) 角面集群是多功能无机构建块.
- Ge9集群的功能化允许对电子和结构性质进行调整.
研究的目的:
- 为了合成和描述新的四位置换中性Ge9星团.
- 研究这些新的Ge9化合物的结构多样性和溶液动态.
主要方法:
- 合成涉及K4Ge9与素,有机化物,环二烯和乙烯胺的反应.
- 使用X射线晶体学进行结构确定.
- 通过可变温度核磁共振 (NMR) 光谱学研究溶液动力学.
主要成果:
- 合成了三个中性四位置换的Ge9集群,[Ge9{Si(SiMe3) 3}3R'](0) 其中R' = Et (1),Sn(n) Bu3 (2),或Tl (3).
- 结构显示出外结合的超替代物和第四替代物 (Et,Sn或Tl) 的不同位置.
- 核磁共振研究表明温度依赖的动态,表明1和2的分子内重组,以及3的离子解离/结合.
结论:
- 合成提供了一个新类中性,功能化的Ge9集群的访问权限.
- 结构的多样性源于第四个替代物的性质和位置.
- 泰替代集群在溶液中表现出显著的离子特征.
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