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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">vuzbiochemi</journal-id><journal-title-group><journal-title xml:lang="ru">Известия вузов. Прикладная химия и биотехнология</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of Universities. Applied Chemistry and Biotechnology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2227-2925</issn><issn pub-type="epub">2500-1558</issn><publisher><publisher-name>ИРНИТУ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21285/achb.994</article-id><article-id custom-type="edn" pub-id-type="custom">OCHSIR</article-id><article-id custom-type="elpub" pub-id-type="custom">vuzbiochemi-1518</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>ХИМИЧЕСКИЕ НАУКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CHEMICAL SCIENCES</subject></subj-group></article-categories><title-group><article-title>Конденсация 2-хлорпиридиний хлорида с тиомочевиной: строение образующегося продукта и его использование в качестве блескообразующей добавки в электролит никелирования</article-title><trans-title-group xml:lang="en"><trans-title>Condensation of 2-chloropyridinium chloride with thiourea: Structure of the resulting product and its use as a brightener in nickel plating electrolytes</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1067-7755</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Грабельных</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Grabelnykh</surname><given-names>V. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Грабельных Валентина Александровна, к.х.н., научный сотрудник</p><p>664033, г. Иркутск, ул. Фаворского, 1</p></bio><bio xml:lang="en"><p>Valentina A. Grabelnykh, Cand. Sci. (Chemistry), Researcher</p><p>1, Favorsky St., Irkutsk, 664033</p></bio><email xlink:type="simple">venk@irioch.irk.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8815-9280</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сосновская</surname><given-names>Н. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Sosnovskaya</surname><given-names>N. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сосновская Нина Геннадьевна, к.т.н., доцент, заведующий кафедрой</p><p>665825, г. Ангарск, ул. Чайковского, 60</p></bio><bio xml:lang="en"><p>Nina G. Sosnovskaya, Cand. Sci. (Engineering), Associate Professor, Head of the Department</p><p>60, Tchaikovsky St., Angarsk, 665825</p></bio><email xlink:type="simple">sosnina148@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3107-6975</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Истомина</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Istomina</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Истомина Алена Андреевна, к.т.н., доцент</p><p>665825, г. Ангарск, ул. Чайковского, 60</p></bio><bio xml:lang="en"><p>Alena A. Istomina, Cand. Sci. (Engineering), Associate Professor,</p><p>60, Tchaikovsky St., Angarsk, 665825</p></bio><email xlink:type="simple">alenaist@yandex.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7267-5416</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Албанов</surname><given-names>А. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Albanov</surname><given-names>A. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Албанов Александр Иванович, к.х.н., старший научный сотрудник</p><p>664033, г. Иркутск, ул. Фаворского, 1</p></bio><bio xml:lang="en"><p>Alexandr I. Albanov, Cand. Sci. (Chemistry), Senior Researcher</p><p>1, Favorsky St., Irkutsk, 664033</p></bio><email xlink:type="simple">albanov@irioch.irk.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>Корчевин</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Korchevin</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Корчевин Николай Алексеевич, д.х.н., ведущий научный сотрудник; профессор</p><p>664033, г. Иркутск, ул. Фаворского, 1;</p><p>665825, г. Ангарск, ул. Чайковского, 60</p></bio><bio xml:lang="en"><p>Nikolai A. Korchevin, Dr. Sci. (Chemistry), Leading Researcher; Professor</p><p>1, Favorsky St., Irkutsk, 664033;</p><p>60, Tchaikovsky St., Angarsk, 665825</p></bio><email xlink:type="simple">venk@irioch.irk.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5266-1527</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Истомина</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Istomina</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Истомина Наталия Владимировна, д.х.н., профессор, проректор по учебной работе</p><p>665825, г. Ангарск, ул. Чайковского, 60</p></bio><bio xml:lang="en"><p>Nataliya V. Istomina, Dr. Sci. (Chemistry), Professor, Vice-Rector for Academic Affairs</p><p>60, Tchaikovsky St., Angarsk, 665825</p></bio><email xlink:type="simple">prorector@angtu.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7817-7816</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Розенцвейг</surname><given-names>И. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Rozentsveig</surname><given-names>I. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Розенцвейг Игорь Борисович, д.х.н., доцент, заведующий лабораторией; профессор</p><p>664033, г. Иркутск, ул. Фаворского, 1;</p><p>664003, г. Иркутск, ул. Карла Маркса, 1</p></bio><bio xml:lang="en"><p>Igor B. Rozentsveig, Dr. Sci. (Chemistry), Associate Professor, Head of the Laboratory; Professor</p><p>1, Favorsky St., Irkutsk, 664033;</p><p>1, Karl Marks St., Irkutsk, 664003</p></bio><email xlink:type="simple">i_roz@irioch.irk.ru</email><xref ref-type="aff" rid="aff-4"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Иркутский институт химии им. А.Е. Фаворского СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>A.E. Favorsky Irkutsk Institute of Chemistry of the Siberian Branch of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Ангарский государственный технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Angarsk State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Иркутский институт химии им. А.Е. Фаворского СО РАН; &#13;
Ангарский государственный технический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>A.E. Favorsky Irkutsk Institute of Chemistry of the Siberian Branch of the Russian Academy of Sciences; Angarsk State Technical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Иркутский институт химии им. А.Е. Фаворского СО РАН; &#13;
Иркутский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>A.E. Favorsky Irkutsk Institute of Chemistry of the Siberian Branch of the Russian Academy of Sciences; &#13;
Irkutsk State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>07</day><month>10</month><year>2025</year></pub-date><volume>15</volume><issue>3</issue><fpage>318</fpage><lpage>327</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Грабельных В.А., Сосновская Н.Г., Истомина А.А., Албанов А.И., Корчевин Н.А., Истомина Н.В., Розенцвейг И.Б., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Грабельных В.А., Сосновская Н.Г., Истомина А.А., Албанов А.И., Корчевин Н.А., Истомина Н.В., Розенцвейг И.Б.</copyright-holder><copyright-holder xml:lang="en">Grabelnykh V.A., Sosnovskaya N.G., Istomina A.A., Albanov A.I., Korchevin N.A., Istomina N.V., Rozentsveig I.B.</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://vuzbiochemi.elpub.ru/jour/article/view/1518">https://vuzbiochemi.elpub.ru/jour/article/view/1518</self-uri><abstract><p>С целью исключения влияния основного центра – атома азота в пиридине – на устойчивость получаемой из 2-хлорпиридина изотиурониевой соли предварительно получена и впервые спектрально охарактеризована протонированная форма – хлорид 2-хлорпиридиния. Синтезированное соединение легко конденсируется с тиомочевиной с образованием изотиурониевой соли. По данным спектроскопии ядерного магнитного резонанса (1H и 13С) показано, что соль существует в виде двух устойчивых конформеров относительно связи пиридин С2–SC(NH2)2, которые в спектрах ядерного магнитного резонанса  13С наиболее существенно различаются смещением сигнала С4 в пиридиновом цикле относительно сигнала в незаряженном 2-хлорпиридине. Присутствие двух устойчивых конформеров определяется наличием в α-положении дополнительного основного центра, что может быть общей закономерностью для соединений подобного типа. Синтезированный пиридиний изотиуроний хлорид был исследован в качестве блескообразующей добавки в электролит никелирования. Предварительные испытания с использованием ячейки Хулла позволили выявить рабочие диапазоны концентраций добавки 0,10–0,45 г/л и рабочих плотностей тока (3–20 А/дм2). Обнаружено, что введение добавки в концентрации 0,40–0,45 г/л в сульфатный электролит никелирования позволяет получить с высоким выходом по току блестящее никелевое покрытие, обладающее низкой пористостью и высокой твердостью. Микротвердость увеличивается с увеличением концентрации введенной добавки.</p></abstract><trans-abstract xml:lang="en"><p>The protonated form, 2-chloropyridinium chloride, was synthesized and characterized spectroscopically for the first time to eliminate the influence of the basic nitrogen center in pyridine on the stability of the resulting isothiuronium salt. This compound readily condensed with thiourea to form the corresponding isothiuronium salt. Nuclear magnetic resonance (NMR) spectroscopy (1H and 13C) revealed that the salt exists as two stable conformers differing in the orientation around the C2–SC(NH2)2 bond. These conformers are most clearly distinguished in the 13C NMR spectra by the chemical shift of the C4 signal in the pyridine ring relative to its position in neutral 2-chloropyridine. The presence of two stable conformers, determined by an additional basic center in the α-position, may represent a general pattern for this class of compounds. The synthesized pyridinium isothiuronium chloride was investigated as a brightener in a nickel plating electrolyte. Preliminary tests using a Hull cell identified an effective concentration range of 0.10–0.45 g/L and operational current densities of 3–20 A/dm2. The addition of the agent at 0.40–0.45 g/L to a sulfate nickel plating electrolyte produced bright nickel coatings with high current efficiency, low porosity, and increased hardness. The microhardness of the coating was found to increase with the additive concentration.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>2-хлорпиридин</kwd><kwd>хлорид 2-хлорпиридиния</kwd><kwd>дихлорид 2-пиридинилизотиурония</kwd><kwd>конформеры</kwd><kwd>спектры ядерного магнитного резонанса 13С</kwd><kwd>блестящее никелирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>2-chloropyridine</kwd><kwd>2-chloropyridinium chloride</kwd><kwd>2-pyridinylisothiuronium dichloride</kwd><kwd>conformers</kwd><kwd>13C nuclear magnetic resonance spectra</kwd><kwd>bright nickel plating</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Спектральные и аналитические данные были получены с использованием оборудования Байкальского аналитического центра коллективного пользования Иркутского института химии им. А.Е. Фаворского СО РАН (г. Иркутск, Россия).</funding-statement><funding-statement xml:lang="en">Spectral and analytical data were obtained using the equipment of the Baikal Analytical Center for Collective Use of the A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences (Irkutsk, Russia).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Lukevits É. Pyridine derivatives in the drug arsenal (150 years of pyridine chemistry) // Chemistry of Heterocyclic Compounds. 1995. Vol. 31. P. 639–650. DOI: 10.1007/BF01169065.</mixed-citation><mixed-citation xml:lang="en">Lukevits É. Pyridine derivatives in the drug arsenal (150 years of pyridine chemistry). Chemistry of Heterocyclic Compounds. 1995;31:639-650. 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