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Density Functional Theory Study of the Hydrogen Bonding Interaction of 1:1 Complexes of Formamide with Glycine

机译:甲酰胺与甘氨酸1:1配合物氢键相互作用的密度泛函理论研究

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摘要

The hydrogen bonding of 1:1 complexes formed between formamide and glycine molecule has been completely investigated in the present study using density functional theory (DFT) method at varied basis set levels from 6-31G to 6-31 l++G(2d,2p).Twelve reasonable geometries on the potential energy hypersurface of formamide and glycine system are considered with the global minimum,10 of which have a cyclic double-hydrogen-bonded structure and the other two have a one-hydrogen-bonded structure.The optimized geometric parameters and interaction energies for various isomers at different levels are estimated.The infrared spectrum frequencies,IR intensities and the vibrational frequency shifts are reported.
机译:在本研究中,已使用密度泛函理论(DFT)方法在6-31G到6-31 l ++ G(2d)的不同基础水平上对甲酰胺与甘氨酸分子之间形成的1:1配合物的氢键进行了完全研究。 2p)。考虑了甲酰胺和甘氨酸系统的势能超表面上的十二个合理的几何形状,具有全局最小值,其中十个具有环状双氢键结构,另外两个具有单氢键结构。估算了不同异构体在不同水平下的几何参数和相互作用能。报道了红外光谱频率,红外强度和振动频移。

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