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Double perturbation theory: a powerful tool in computational coordination chemistry

机译:双重摄动理论:计算配位化学的强大工具

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Quantum mechanical double perturbation theory offers a route to access a large variety of important chemical and physical molecular properties. The properties that are considered here can be defined as the second derivative of the total energy of a molecule with respect to perturbation parameters arising from, e.g. frequency-dependent or -independent external electric and magnetic fields, nuclear and electronic magnetic moments, relativistic corrections, nuclear displacements, etc. The accessible properties cover, among others, the important fields of electronic and vibrational spectra, nuclear magnetic resonance (NMR), electron paramagnetic resonance (EPR) and optical activity. We will outline the methodology that gives access to these properties, and discuss a number of them in detail together with applications to transition metal compounds. All these properties are treated within the same theoretical framework in order to illustrate the similarities between them.
机译:量子力学双扰动理论提供了一种途径,可以访问各种重要的化学和物理分子特性。此处考虑的性质可以定义为分子总能量相对于由例如分子产生的扰动参数的二阶导数。频率相关或独立的外部电场和磁场,核和电子磁矩,相对论校正,核位移等。可访问的特性包括电子和振动光谱,核磁共振(NMR)等重要领域,电子顺磁共振(EPR)和光学活性。我们将概述获得这些特性的方法,并详细讨论其中的许多方法以及在过渡金属化合物中的应用。所有这些属性都在相同的理论框架内进行处理,以说明它们之间的相似性。

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