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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-29</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>***</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>***</subject></subj-group></article-categories><title-group><article-title>ВЛИЯНИЕ РАСТВОРИТЕЛЕЙ НА СТАБИЛЬНОСТЬ, ЭЛЕКТРОННУЮ СТРУКТУРУ И ЯКР-ПАРАМЕТРЫ ИЗОМЕРОВ Fe(CO)4py</article-title><trans-title-group xml:lang="en"><trans-title>SOLVENT EFFECTS ON STABILITY, ELECTRONIC STRUCTURE, AND14N NQR PARAMETERS OF Fe(CO)4py ISOMERS</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><email xlink:type="simple">ezaghiasi1353@yahoo.com, rghiasi@iauet.ac.ir</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>Peikari</surname><given-names>A. .</given-names></name><name name-style="western" xml:lang="en"><surname>Peikari</surname><given-names>A. .</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Восточно-Тегеранский филиал Исламского университета Азад</institution></aff><aff xml:lang="en"><institution>East Tehran branch, Islamic Azad university</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Школа молодых исследователей Исламского университета Азад</institution></aff><aff xml:lang="en"><institution>Young Researchers and Elite Club, Pharmaceutical Science Branch, Islamic Azad University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>10</day><month>03</month><year>2020</year></pub-date><volume>84</volume><issue>1</issue><elocation-id>166(1)-166(8)</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Ghiasi R..., Peikari A..., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Ghiasi R..., Peikari A...</copyright-holder><copyright-holder xml:lang="en">Ghiasi R..., Peikari A...</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/29">https://zhps.ejournal.by/jour/article/view/29</self-uri><abstract><p>C использованием модели поляризуемого континуума методом MPW1PW91 рассчитаны структура, стабильность,14N ЯКР-параметры и гиперполяризуемость изомеров Fe(CO)4py в различных растворителях. Установлено, что изомер Fe(CO)4pyaxial более стабилен, чем Fe(CO)4pyequatorial, относительные энергии уменьшаются для более полярных растворителей. Молекулярный орбитальный анализ показывает, что наивысшая молекулярная орбиталь изомера Fe(CO)4py относится к связи Fe(CO)4, а самая низкая незанятая молекулярная орбиталь локализована на лиганде пиридина. Предполагается, что нелинейные оптические свойства зависят от полярности растворителя.</p></abstract><trans-abstract xml:lang="en"><p>The structure, stability,14N NQR parameters, and hyperpolarizability of Fe(CO)4py isomers in seven different solvents were computed with the MPW1PW91 method based on the polarizable continuum model (PCM). From an energetic standpoint, the Fe(CO)4pyaxial isomer was more stable than the Fe(CO)4pyequatorial isomer. On the other hand, the relative energies decreased in more polar solvents. Molecular orbital analysis showed that the HOMO of the Fe(CO)4py isomer was distributed on the Fe(CO)4 fragment, whereas the LUMO was localized on the pyridine ligand. This study suggests that the nonlinear optical (NLO) properties depend on the solvent polarity.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>изомеры Fe(CO)4py</kwd><kwd>влияние растворителя</kwd><kwd>гиперполяризуемость</kwd><kwd>14N ЯКР-параметры</kwd><kwd>Fe(CO)4py isomers</kwd><kwd>solvent effect</kwd><kwd>hyperpolarizability</kwd><kwd>14N NQR parameters</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">A. R. Rossi, R. Hoffmann, Inorg. Chem., 14, 365-374 (1975).</mixed-citation><mixed-citation xml:lang="en">A. R. Rossi, R. Hoffmann, Inorg. Chem., 14, 365-374 (1975).</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">T. P. 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