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2,1,3-BENZOCHALCOGENADIAZOLES: REGULARITIES AND PECULIARITIES OVER A WHOLE CHALCOGEN PENTAD O, S, Se, Te AND Po Full article

Journal Targets in Heterocyclic Systems
ISSN: 1724-9449
Output data Year: 2019, Volume: 23, Pages: 143-154 Pages count : 12 DOI: 10.17374/targets.2020.23.143
Authors Pritchina Elena A. 1,2 , Gritsan Nina P. 1,3 , Rakitin Oleg A. 4,5 , Zibarev Andrey V. 3,6,7
Affiliations
1 (Данные Web of science) Russian Acad Sci, Inst Chem Kinet & Combust, Siberian Branch, Novosibirsk 630090, Russia
2 (Данные Web of science) Novosibirsk State Univ, Dept Nat Sci, Novosibirsk 630090, Russia
3 (Данные Web of science) Novosibirsk State Univ, Dept Phys, Novosibirsk 630090, Russia
4 (Данные Web of science) Russian Acad Sci, Inst Organ Chem, Moscow 119991, Russia
5 (Данные Web of science) South Ural State Univ, Nanotechnol Educ & Res Ctr, Chelyabinsk 454080, Russia
6 (Данные Web of science) Russian Acad Sci, Siberian Branch, Inst Organ Chem, Novosibirsk 630090, Russia
7 (Данные Web of science) Tomsk State Univ, Dept Chem, Tomsk 634050, Russia

Abstract: With DFT calculations, compared where possible with experimental data, molecular and electronic structure of the title compounds 1-5 (chalcogen=O, S, Se, Te and Po, respectively) and their radical ions was studied towards identification of regularities and peculiarities over a whole chalcogen pentad. Calculated properties of neutral molecules covered their geometries, atomic charges, bond orders and QTAIM descriptors, shapes and energies of p-MOs, ionization energy and electron affinity, NICSs, and MEPs; and those of radical ions included geometries, shapes and energies of pi-SOMOs, electron spin density distributions, hyperfine coupling constants and g factors. In the most cases uniform patterns were obtained featuring only some particular peculiarities regarded to a certain chalcogen. The most important findings embrace reduced aromaticity of the heterocycles of 4 and 5 (NICS) and enlarged electrostatic contribution to their X-N bonds (QTAIM; X=Te, Po) as compared with 1-3. However, the ground-state patterns are not enough to explain known differences in heteroatom reactivity of the title compounds. It is suggested that the differences come mainly from reaction kinetics and thermodynamics where widely varied atomic dipole polarizability of the chalcogens should be essentially important.
Cite: Pritchina E.A. , Gritsan N.P. , Rakitin O.A. , Zibarev A.V.
2,1,3-BENZOCHALCOGENADIAZOLES: REGULARITIES AND PECULIARITIES OVER A WHOLE CHALCOGEN PENTAD O, S, Se, Te AND Po
Targets in Heterocyclic Systems. 2019. V.23. P.143-154. DOI: 10.17374/targets.2020.23.143 WOS Scopus РИНЦ
Identifiers:
Web of science: WOS:000525822400008
Scopus: 2-s2.0-85078483090
Elibrary: 43233881
Citing:
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Web of science 11
Scopus 10
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