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New theoretical and experimental infrared results on formaldehyde in solution

机译:溶液中甲醛的红外理论和实验新结果

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An extension of our combined procedure to determine a complete quartic force field and to resolve a vibrational problem thanks to a variational treatment is proposed for quantitative calculations of vibrational spectra in solution. Energies and gradients are obtained through a polarizable continuum model (PCM), the so-called self-consistent isodensity (SCI)-PCM. We present in this paper new experimental results dealing with formaldehyde in solution in cyclohexane, chloroform, THF, acetonitrile, DMSO and water; the obtained vibrational spectra are then compared with CCSD(T)/cc-pVQZ calculations. In addition, density functional theory (DFT) calculations have been carried out with the aim of both anticipating and positioning these approaches for larger sized molecules.
机译:为了确定溶液中的振动谱,我们提出了一种组合方法的扩展方法,该方法可以确定完整的四次力场并通过变分处理来解决振动问题。能量和梯度是通过可极化的连续体模型(PCM),即所谓的自洽等规度(SCI)-PCM获得的。我们在本文中提供了有关甲醛在环己烷,氯仿,THF,乙腈,DMSO和水中的溶液的新实验结果。然后将获得的振动谱与CCSD(T)/ cc-pVQZ计算进行比较。另外,已经进行了密度泛函理论(DFT)计算,以期针对较大尺寸的分子预测和定位这些方法。

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