与CF4和SiF4的 thiazole 复合体内的非共价键的类型
Steve Scheiner1, Akhtam Amonov2
1Department of Chemistry and Biochemistry Utah State University Logan, Utah 84322-0300, USA. steve.scheiner@usu.edu.
这项研究使用DFT计算探索了 thiazole 和 CF4/SiF4 之间的四键 (TB). 虽然CF4的相互作用很弱,但SiF4形成了强大的Si-N TB,在不同温度下非常稳定.
科学领域:
- 计算化学计算化学
- 超分子化学 超分子化学
背景情况:
- 醇具有富含电子的和硫原子和pi系统,使其能够进行电友相互作用.
- 四环键 (TBs) 是一种非共价相互作用,涉及两个易斯酸中心之间的共价键.
研究的目的:
- 调查醇与四甲 (CF4) 和四化 (SiF4) 之间形成环键的可能性.
- 探索温度和振动能量对这些复合物的稳定性的影响.
主要方法:
- 用密度函数理论 (DFT) 的计算来建模相互作用.
- 分析包括潜在能量表面,零点振动能量和效应.
主要成果:
- 醇-CF4复合物表现出弱相互作用 (<2 kcal mol-1),具有可疑的四键特性.
- 醇-SiF4相互作用显示出不同的配置,其中一个主要的复合体具有强大的Si-N四键 (30 kcal mol-1).
- 取决于温度的分析显示,CF4和SiF4复合体的首选几何结构发生了显著的变化.
结论:
- 与CF4形成的四键在能量上是不利的,并且对温度敏感.
- 一个高度稳定的 thiazole-SiF4 复合物被强大的 Si-N 四键稳定,被确定,并且仍然是所有研究温度中最稳定的配置.
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