Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5416690 | Journal of Molecular Structure: THEOCHEM | 2009 | 5 Pages |
Abstract
Thirteen low-lying conformers of 2-aminoethanol (AE) has been studied by ab initio calculations at B3LYP, MP2, MP3 and MP4 (SDTQ) levels of theory with aug-cc-pVDZ basis set. The gaucheâ²-Gauche-gaucheâ² (gâ²Ggâ²) conformer having the intramolecular hydrogen bond (HB) OHâ¯N is the most stable one. Vertical ionization energies of the two outer valence molecular orbitals for each conformer predicted with the electron propagator theory are in good agreement with the experimental data in the literature and the temperature dependence of photoelectron spectra (PES) is interpreted when taken into account the Boltzmann populations of the conformers. Natural bond orbital (NBO) analyses exhibit a remarkable influence on the molecular electronic structures by the strong intramolecular HB OHâ¯N and the relative weak intramolecular HB NHâ¯O, leading to the significantly lowered energy levels of the occupied lone-pair molecular orbitals.
Related Topics
Physical Sciences and Engineering
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Physical and Theoretical Chemistry
Authors
Kedong Wang, Xu Shan, XiangJun Chen,