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The Effect of Multiple Substituents on Sandwich and T-Shaped pi-pi Interactions

机译:多种取代基对三明治和T形pi-pi相互作用的影响

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摘要

Sandwich and T-shaped configurations of substituted benzene dimers were studied by second-order perturbation theory to determine how substituents tune pi-pi interactions.Remarkably,multiple substituents have an additive effect on the binding energy of sandwich dimers,except in some cases when substituents are aligned on top of each other.The energetics of substituted T-shaped configurations are more complex,but nevertheless a simple model that accounts for electrostatic and dispersion interactions(and direct contacts between substituents on one ring and hydrogen atoms on the other),provides a good match to the quantum mechanical results.These results provide insight into the manner by which substituents csan be utilized in supra-molecular design.
机译:通过二阶扰动理论研究了取代苯二聚体的三明治和T形构型,以确定取代基如何调节pi-pi相互作用。值得注意的是,多个取代基对三明治二聚体的结合能有加和作用,除了在某些情况下取代基取代的T形构型的能量学比较复杂,但是仍然提供了一个简单的模型,该模型考虑了静电和分散相互作用(以及一个环上的取代基与另一个环上的氢原子之间的直接接触)这些结果与量子力学结果非常匹配。这些结果提供了对超分子设计中取代基csan的利用方式的见解。

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