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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">plasticnews</journal-id><journal-title-group><journal-title xml:lang="ru">Пластические массы</journal-title><trans-title-group xml:lang="en"><trans-title>Plasticheskie massy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0554-2901</issn><publisher><publisher-name>PLASTMASSY Publishing House (Moscow)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.35164/0554-2901-2026-02-30-33</article-id><article-id custom-type="elpub" pub-id-type="custom">plasticnews-1235</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>АНАЛИЗ И МЕТОДЫ РАСЧЁТА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ANALYSIS AND CALCULATION METHODS</subject></subj-group></article-categories><title-group><article-title>Квантово-химический расчёт олефинов, разветвленных в β-положении в толуоле, методом DFT</article-title><trans-title-group xml:lang="en"><trans-title>Quantum-chemical calculation of olefins branched in the β-position in toluene by the DFT method</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>Бабкин</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Babkin</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Михайловка, Волгоградская область </p></bio><bio xml:lang="en"><p>Mikhaylovka, Volgograd region </p></bio><email xlink:type="simple">babkin_v.a@mail.ru</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>Чулкова</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Chulkova</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Михайловка, Волгоградская область </p></bio><bio xml:lang="en"><p>Mikhaylovka, Volgograd region </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сеничкина</surname><given-names>А. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Senichkina</surname><given-names>A. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Михайловка, Волгоградская область </p></bio><bio xml:lang="en"><p>Mikhaylovka, Volgograd region </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сбойчакова</surname><given-names>Е. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Sboychakova</surname><given-names>E. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Михайловка, Волгоградская область </p></bio><bio xml:lang="en"><p>Mikhaylovka, Volgograd region </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Андреев</surname><given-names>Д. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Andreev</surname><given-names>D. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Михайловка, Волгоградская область </p></bio><bio xml:lang="en"><p>Mikhaylovka, Volgograd region </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Минаев</surname><given-names>Н. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Minaev</surname><given-names>N. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Михайловка, Волгоградская область </p></bio><bio xml:lang="en"><p>Mikhaylovka, Volgograd region </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Белоусова</surname><given-names>В. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Belousova</surname><given-names>V. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Арцис</surname><given-names>М. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Artsis</surname><given-names>M. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Харлов</surname><given-names>А. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Kharlov</surname><given-names>A. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Титова</surname><given-names>Е. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Titova</surname><given-names>E. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Волгоград</p></bio><bio xml:lang="en"><p>Volgograd</p></bio><xref ref-type="aff" rid="aff-5"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Себряковский филиал Волгоградского государственного технического университета</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Sebryakovsky Branch of Volgograd State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Первый Московский Государственный медицинский университет имени И.М. Сеченова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>I.M. Sechenov First Moscow State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Институт биохимической физики РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Biochemical Physics of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Московский государственный университет им. М.В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-5"><aff xml:lang="ru"><institution>Волгоградский государственный технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Volgograd State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>15</day><month>05</month><year>2026</year></pub-date><volume>1</volume><issue>2</issue><fpage>30</fpage><lpage>33</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Бабкин В.А., Чулкова А.В., Сеничкина А.П., Сбойчакова Е.Д., Андреев Д.С., Минаев Н.С., Белоусова В.С., Арцис М.И., Харлов А.Е., Титова Е.С., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Бабкин В.А., Чулкова А.В., Сеничкина А.П., Сбойчакова Е.Д., Андреев Д.С., Минаев Н.С., Белоусова В.С., Арцис М.И., Харлов А.Е., Титова Е.С.</copyright-holder><copyright-holder xml:lang="en">Babkin V.A., Chulkova A.V., Senichkina A.P., Sboychakova E.D., Andreev D.S., Minaev N.S., Belousova V.S., Artsis M.I., Kharlov A.E., Titova E.S.</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://www.plastics-news.ru/jour/article/view/1235">https://www.plastics-news.ru/jour/article/view/1235</self-uri><abstract><p>Впервые выполнен квантово-химический расчет молекулы 4-метилпентена-1, 4-метилгексена-1, 4,4-диметилпентена-1 в толуоле классическим методом DFT. Теоретически оценена их кислотная сила (pKa = 30–29). Установлено, что изучаемые олефины относится к классу очень слабых H-кислот (pKa &gt; 14).</p></abstract><trans-abstract xml:lang="en"><p>For the first time, the quantum chemical calculation of the 4-methylpentene-1, 4-methylhexene-1, 4,4-dimethylpentene-1 molecule in toluene was performed using the classical DFT method. Their acid strength is theoretically estimated (pKa = 30–29). It has been established that the studied olefins belong to the class of very weak H-acids (pKa &gt; 14).</p></trans-abstract><kwd-group xml:lang="ru"><kwd>квантово-химический расчет</kwd><kwd>метод DFT</kwd><kwd>4-метилпентен-1</kwd><kwd>4-метилгексен-1</kwd><kwd>4</kwd><kwd>4-диметилпентен-1</kwd><kwd>толуол</kwd><kwd>кислотная сила</kwd></kwd-group><kwd-group xml:lang="en"><kwd>quantum-chemical calculation</kwd><kwd>DFT</kwd><kwd>4-methylpentene-1</kwd><kwd>4-methylhexene-1</kwd><kwd>4</kwd><kwd>4-dimethylpentene-1</kwd><kwd>tolyol</kwd><kwd>acid strength</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">Кеннеди Дж. Катионная полимеризация олефинов: пер. с англ. М.: Мир, 1978. 431 с.</mixed-citation><mixed-citation xml:lang="en">Кеннеди Дж. Катионная полимеризация олефинов: пер. с англ. 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