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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">zhps</journal-id><journal-title-group><journal-title xml:lang="ru">Журнал прикладной спектроскопии</journal-title><trans-title-group xml:lang="en"><trans-title>Zhurnal Prikladnoii Spektroskopii</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0514-7506</issn><publisher><publisher-name>B. I. Stepanov Institute of Physics of the National Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">zhps-653</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>АННОТАЦИИ АНГЛОЯЗЫЧНЫХ СТАТЕЙ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ABSTRACTS ENGLISH-LANGUAGE ARTICLES</subject></subj-group></article-categories><title-group><article-title>ЧИСЛЕННОЕ МОДЕЛИРОВАНИЕ ПАРАМЕТРОВ 14N ЯДЕРНОГО КВАДРУПОЛЬНОГО РЕЗОНАНСА БОРАЗИНА</article-title><trans-title-group xml:lang="en"><trans-title>A COMPUTATIONAL INVESTIGATION OF THE 14N NQR PARAMETERS OF BORAZYNE</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ghiasi</surname><given-names>R.</given-names></name><name name-style="western" xml:lang="en"><surname>Ghiasi</surname><given-names>R.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><email xlink:type="simple">rezaghiasi1353@yahoo.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Sadeghi</surname><given-names>N.</given-names></name><name name-style="western" xml:lang="en"><surname>Sadeghi</surname><given-names>N.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Исламский университет Азада</institution></aff><aff xml:lang="en"><institution>Department of Chemistry, Faculty of Science, East Tehran Branch, Islamic Azad University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Исламский университет Азада</institution></aff><aff xml:lang="en"><institution>Department of Chemistry, Faculty of Science, Arak Branch, Islamic Azad University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>30</day><month>06</month><year>2020</year></pub-date><volume>87</volume><issue>3</issue><elocation-id>506(1)-506(7)</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Ghiasi R., Sadeghi N., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Ghiasi R., Sadeghi N.</copyright-holder><copyright-holder xml:lang="en">Ghiasi R., Sadeghi N.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://zhps.ejournal.by/jour/article/view/653">https://zhps.ejournal.by/jour/article/view/653</self-uri><abstract><p>В рамках теории M062X/6-311G (d,p) описаны 14N ЯКР параметры возможных изомеров боразина в синглетном и триплетном состояниях. Оценены компоненты qxx, qyy, qzz тензора градиента электрического поля, константа ядерной квадрупольной связи (czz, cyy, cxx), параметр асимметрии h, частоты ядерного квадрупольного резонанса n+, n–, n0. Рассчитаны относительная энергия, энергия пограничной орбитали и разница между энергиями верхней и нижней молекулярных орбиталей этих изомеров. С энергетической точки зрения орто- и мета-(2) изомеры наиболее стабильны в синглетном и триплетном состояниях. Синглетное состояние — более стабильный спиновый изомер по сравнению с триплетным состоянием для всех изомеров кроме мета(2). Анализ ароматичности изученных молекул на основе ядерно-независимого химического сдвига показывает, что ароматичность триплетного состояния больше, чем синглетного, для орто- и параизомеров. Для мета-(2) изомера ароматичность синглетного состояния выше, чем триплетного. Для расчета атомного заряда атомов азота использован метод естественной орбитали.</p></abstract><trans-abstract xml:lang="en"><p>In this study, the 14N NQR parameters of the possible isomers of borazyne were reported in the singlet and triplet states at the M062X/6-311G(d,p) level of theory. Electric field gradient tensors (qxx, qyy,qzz), nuclear quadrupole coupling constants (czz, cyy, cxx), asymmetry parameter (h), and nuclear quadrupole resonance frequencies (n+, n–, n0) were estimated. Relative energy, frontier orbital energy, and HOMO-LUMO gap values of these isomers were calculated. From the energetic aspect, ortho and meta(2) isomers were the most stable isomers in the singlet and triplet states, respectively. The singlet state was a more stable spin isomer compared to the triplet state between all isomers, except the meta(2) isomer. Aromaticity analysis of the studied molecules on the basis of nucleus-independent chemical shift values showed that the aromaticity of the triplet state was stronger than that of the singlet state for ortho and para isomers. For the meta (2) isomer, the aromaticity of the singlet state was stronger than that of the triplet state. To calculate the atomic charge of nitrogen atoms, natural bonding orbital method analysis was used.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>боразин</kwd><kwd>параметры ядерного квадрупольного резонанса 14N</kwd><kwd>ядерно-независимый химический сдвиг</kwd><kwd>естественная орбиталь</kwd></kwd-group><kwd-group xml:lang="en"><kwd>borazyne</kwd><kwd>14N NQR parameters</kwd><kwd>nucleus-independent chemical shift</kwd><kwd>natural bonding orbital</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">M. A. Neiss, R. F. Porter, J. Am. Chem. 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