Molecular-dynamic study of liquid ethylenediamine
- 作者: Balabaev N.1, Kraevskii S.2, Rodnikova M.2, Solonina I.2
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隶属关系:
- Institute of Mathematical Problems of Biology
- Kurnakov Institute of General and Inorganic Chemistry
- 期: 卷 90, 编号 10 (2016)
- 页面: 1986-1992
- 栏目: Structure of Matter and Quantum Chemistry
- URL: https://journals.rcsi.science/0036-0244/article/view/168838
- DOI: https://doi.org/10.1134/S0036024416100034
- ID: 168838
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详细
Models of liquid ethylenediamine (ED) are built using the molecular dynamics approach at temperatures of 293–363 K and a size of 1000 molecules in a basic cell as a cuboid. The structural and dynamic characteristics of liquid ED versus temperature are derived. The gauche conformation of the ED molecule that is characteristic of the gas phase is shown to transition easily into the trans conformation of the molecules in the liquid. NH···N hydrogen bonds are analyzed in liquid ED. The number of H-bonds per ED molecule is found to vary from 5.02 at 293 K to 3.86 at 363 K. The lifetimes in the range of the temperatures and dissociation activation energy for several H-bonds in liquid ED are found to range from 0.574 to 4.524 ps at 293 K; the activation energies are 8.8 kJ/mol for 50% of the H-bonds and 16.3 kJ/mol for 6.25% of them. A weaker and more mobile spatial grid of H-bonds in liquid ED is observed, compared to data calculated earlier for monoethanolamine.
作者简介
N. Balabaev
Institute of Mathematical Problems of Biology
Email: rodnikova@igic.ras.ru
俄罗斯联邦, Pushchino, 142290
S. Kraevskii
Kurnakov Institute of General and Inorganic Chemistry
Email: rodnikova@igic.ras.ru
俄罗斯联邦, Moscow, 119991
M. Rodnikova
Kurnakov Institute of General and Inorganic Chemistry
编辑信件的主要联系方式.
Email: rodnikova@igic.ras.ru
俄罗斯联邦, Moscow, 119991
I. Solonina
Kurnakov Institute of General and Inorganic Chemistry
Email: rodnikova@igic.ras.ru
俄罗斯联邦, Moscow, 119991