Propagator quantum chemical study of S-cis-(Z)-2-(2-formylethenyl)pyrrole: electronic structure and aspects of intramolecular hydrogen bond manifestation in ionization spectra
- 作者: Trofimov B.1,2, Belogolova A.1,2, Soshnikov D.2, Moskovskaya T.2, Vitkovskaya N.2, Trofimov B.1
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隶属关系:
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences
- Irkutsk State University
- 期: 卷 66, 编号 12 (2017)
- 页面: 2241-2247
- 栏目: Full Article
- URL: https://journals.rcsi.science/1066-5285/article/view/241749
- DOI: https://doi.org/10.1007/s11172-017-2008-0
- ID: 241749
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详细
For the purpose of investigation of the electronic structures of functionalized pyrroles with potential biological activity the electronic structures and ionization spectra of S-cis-(Z)-2-(2-formylethenyl)pyrrole (FP) were calculated by the propagator quantum chemical method. The calculations were performed using the third-order algebraic diagrammatic construction method (ADC(3)) for one-particle Green´s function (electronic propagator) and the 6–31G** basis set. Going from FP (possessing the intramolecular hydrogen bond H⋯O) to its conformation FPR (without H⋯O bonding), the O1s-ionization energy and the ionization energy of the σ-type lone electron pair orbital of the O atom decrease by ~0.2 eV, which is a consequence of stopping the electron density transfer from the O atom. A strong electron density transfer through the hydrogen bond from the O atom to the NH group occurs in the nitrogen core level ionization spectrum as evidenced by a lower N1s-ionization energy of FP (by ~0.7 eV ) compared to that of FPR. The valence shell ionization spectra of FP and FPR calculated using the ADC(3) method are characterized by a high density of the satellite states. The results obtained indicate that the electronic structures of the compounds of the considered class are characterized by pronounced effects of electron correlation.
作者简介
B. Trofimov
A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences; Irkutsk State University
编辑信件的主要联系方式.
Email: abtrof@mail.ru
俄罗斯联邦, 1 ul. Favorskogo, Irkutsk, 664033; 1 ul. Karla Marksa, Irkutsk, 664003
A. Belogolova
A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences; Irkutsk State University
Email: abtrof@mail.ru
俄罗斯联邦, 1 ul. Favorskogo, Irkutsk, 664033; 1 ul. Karla Marksa, Irkutsk, 664003
D. Soshnikov
Irkutsk State University
Email: abtrof@mail.ru
俄罗斯联邦, 1 ul. Karla Marksa, Irkutsk, 664003
T. Moskovskaya
Irkutsk State University
Email: abtrof@mail.ru
俄罗斯联邦, 1 ul. Karla Marksa, Irkutsk, 664003
N. Vitkovskaya
Irkutsk State University
Email: abtrof@mail.ru
俄罗斯联邦, 1 ul. Karla Marksa, Irkutsk, 664003
B. Trofimov
A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences
Email: abtrof@mail.ru
俄罗斯联邦, 1 ul. Favorskogo, Irkutsk, 664033