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Gauge Dependence of the (S)over-tilde Molecular Orbital Space Decomposition of Optical Rotation

机译:尺寸依赖于光学旋转的过度波浪分子轨道空间分解的依赖性

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The measurement of optical rotation (OR) is a foundational technique for the detection and characterization of chiral molecules, but it is poorly understood how the observed property relates to the structure of the molecule. Over the years, several schemes have been developed to decompose the OR into more chemically intuitive contributions. In this paper, we introduce two alternative formulations of our previously developed (S) over tilde molecular orbital space decomposition. These new expressions use the modified velocity gauge-magnetic (MVG-M) and -electric (MVG-E) definitions of OR, rather than the length gauge-magnetic (LG-M) definition used in the original paper. Comparing these formulations across a small set of previously studied chiral molecules, we find that these different definitions produce consistent physical interpretations of the OR. These results demonstrate that the (S) over tilde methodology for investigations of structure-property relationships in chiral molecules is insensitive to the choice of gauge.
机译:旋光度(OR)的测量是手性分子检测和表征的基础技术,但人们对观察到的性质与分子结构的关系知之甚少。多年来,已经开发了几种方案来将OR分解为更直观的化学贡献。在这篇文章中,我们介绍了我们之前开发的两个替代公式,即tilde分子轨道空间分解。这些新表达式使用了OR的修正速度计磁(MVG-M)和-电(MVG-E)定义,而不是原始论文中使用的长度计磁(LG-M)定义。通过比较之前研究过的一小部分手性分子的这些配方,我们发现这些不同的定义对OR产生了一致的物理解释。这些结果表明,用于研究手性分子结构-性质关系的(S)over-tilde方法对规范的选择不敏感。

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