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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">chemicallytech</journal-id><journal-title-group><journal-title xml:lang="en">Fine Chemical Technologies</journal-title><trans-title-group xml:lang="ru"><trans-title>Тонкие химические технологии</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2410-6593</issn><issn pub-type="epub">2686-7575</issn><publisher><publisher-name>MIREA – Russian Technological University (RTU MIREA).</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32362/2410-6593-2023-18-6-583-594</article-id><article-id custom-type="elpub" pub-id-type="custom">chemicallytech-2016</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="en"><subject>CHEMISTRY AND TECHNOLOGY OF INORGANIC MATERIALS</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ХИМИЯ И ТЕХНОЛОГИЯ НЕОРГАНИЧЕСКИХ МАТЕРИАЛОВ</subject></subj-group></article-categories><title-group><article-title>Coordination compounds of indium, gadolinium,  and erbium nitrates with low urea content</article-title><trans-title-group xml:lang="ru"><trans-title>Координационные соединения нитратов индия,  гадолиния и эрбия с низким содержанием мочевины</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2088-5091</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Савинкина</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Savinkina</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Савинкина Елена Владимировна, д.х.н., профессор кафедры неорганической химии им. А.Н. Реформатского, Институт тонких химических технологий им. М.В. Ломоносова</p><p>119571, Москва, пр-т Вернадского, д. 86</p><p>Scopus Author ID 8419176500, ResearcherID G-2949-2013</p></bio><bio xml:lang="en"><p>Elena V. Savinkina, Dr. Sci. (Chem.), Professor, A.N. Reformatskii Department of Inorganic Chemistry, M.V. Lomonosov Institute of Fine Chemical Technologies</p><p>86, Vernadskogo pr., Moscow, 119571</p><p>Scopus Author ID 8419176500, ResearcherID G-2949-201</p></bio><email xlink:type="simple">savinkina@mirea.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>Караваев</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Karavaev</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Караваев Игорь Александрович, к.х.н., преподаватель кафедры неорганической химии им. А.Н. Реформатского, Институт тонких химических технологий им. М.В. Ломоносова</p><p>119571, Москва, пр-т Вернадского, д. 86</p><p>Scopus Author ID 57214990536, ResearcherID HNP-2255-2023</p></bio><bio xml:lang="en"><p>Igor A. Karavaev, Cand. Sci. (Chem.), Senior Lecturer, A.N. Reformatskii Department of Inorganic Chemistry, M.V. Lomonosov Institute of Fine Chemical Technologies</p><p>Scopus Author ID 57214990536, ResearcherID HNP-2255-2023 </p><p>86, Vernadskogo pr., Moscow, 119571</p></bio><email xlink:type="simple">karavaev@mirea.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/0009-0007-5009-2299</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Беттельс</surname><given-names>Е. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Bettels</surname><given-names>E. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Беттельс Елизавета Карстеновна, аспирант кафедры неорганической химии им. А.Н. Реформатского, Институт тонких химических технологий им. М.В. Ломоносова</p><p>119571, Москва, пр-т Вернадского, д. 86</p></bio><bio xml:lang="en"><p>Elizaveta K. Bettels, Postgraduate Student</p><p>86, Vernadskogo pr., Moscow, 119571</p></bio><email xlink:type="simple">bettels@mirea.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/0000-0003-2676-8774</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бузанов</surname><given-names>Г. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Buzanov</surname><given-names>G. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Бузанов Григорий Алексеевич, к.х.н., старший научный сотрудник</p><p>119071, Москва, Ленинский пр-т, д. 31</p><p>Scopus Author ID 26026544800, ResearcherID N-8207-2015</p></bio><bio xml:lang="en"><p>Grigorii A. Buzanov, Cand. Sci. (Chem.), Senior Researcher</p><p>31, Leninskii pr., Moscow, 119071</p><p>Scopus Author ID 26026544800, ResearcherID N-8207-2015</p></bio><email xlink:type="simple">gbuzanov@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/0000-0002-0156-5535</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кубасов</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kubasov</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кубасов Алексей Сергеевич, к.х.н., старший научный сотрудник</p><p>119071, Москва, Ленинский пр-т, д. 31</p><p>Scopus Author ID 56118634600, ResearcherID J-5588-2016</p></bio><bio xml:lang="en"><p>Aleksei S. Kubasov, Cand. Sci. (Chem.), Senior Researcher</p><p>Scopus Author ID 56118634600, ResearcherID J-5588-2016</p><p>31, Leninskii pr., Moscow, 119071</p></bio><email xlink:type="simple">fobosax@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>МИРЭА – Российский технологический университет (Институт тонких химических технологий им. М.В. Ломоносова)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>MIREA – Russian Technological University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт общей и неорганической химии им. Н.С. Курнакова Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>18</day><month>01</month><year>2024</year></pub-date><volume>18</volume><issue>6</issue><fpage>583</fpage><lpage>594</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Savinkina E.V., Karavaev I.A., Bettels E.K., Buzanov G.A., Kubasov A.S., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Савинкина Е.В., Караваев И.А., Беттельс Е.К., Бузанов Г.А., Кубасов А.С.</copyright-holder><copyright-holder xml:lang="en">Savinkina E.V., Karavaev I.A., Bettels E.K., Buzanov G.A., Kubasov A.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.finechem-mirea.ru/jour/article/view/2016">https://www.finechem-mirea.ru/jour/article/view/2016</self-uri><abstract><sec><title>Objectives</title><p>Objectives. To date, compounds of rare earth nitrates with urea in a ratio of 1:4 and indium in a ratio of 1:6 have been synthesized and structurally characterized. However, there is a lack of research into similar compounds having a lower urea content. The purpose of this work was to continue the search for regularities of structure formation for complexes of various elements with urea.</p></sec><sec><title>Methods</title><p>Methods. Novel coordination compounds were synthesized and characterized by powder- and single-crystal X-ray diffraction analysis, as well as infrared spectroscopy.</p></sec><sec><title>Results</title><p>Results. The interaction of indium, gadolinium and erbium nitrates with urea (Ur) in an aqueous solution under conditions of ligand deficiency produces the previously unknown coordination compounds cis-[In(Ur)4(NO3)2]NO3, [Gd(H2O)2(Ur)2(NO3)3], and [Er(H2O)2(Ur)(NO3)3]. The indium complex is shown to have an ionic structure, whereas the gadolinium and erbium complexes have a molecular structure. In the indium complex, the coordination number is 6; the cation has an octahedral structure; it involves two cis-arranged monodentate nitrate groups and four monodentate urea molecules. The coordination number of gadolinium is 10; here, the coordination polyhedron is a distorted pentagonal bipyramid at the vertices of which there are two water molecules, while in the internal polygonal base there are two monodentate urea molecules and three bidentate chelating nitrate groups oriented perpendicular to the polygonal base of the bipyramid. The coordination number of erbium is 9; the coordination polyhedron is a distorted tricapped trigonal prism.</p></sec><sec><title>Conclusions</title><p>Conclusions. In contrast with the gadolinium complex, one urea molecule is coordinated in the erbium complex instead of two, decreasing the coordination number from 10 to 9. In the indium complex cation, the coordination number is 6; unlike the gadolinium and erbium complexes, the cation does not contain water, and the nitrate groups are monodentate.</p></sec></abstract><trans-abstract xml:lang="ru"><sec><title>Цели</title><p>Цели. В настоящее время синтезированы и структурно охарактеризованы соединения нитратов редкоземельных элементов с мочевиной в соотношении 1:4 и индия ― в соотношении 1:6, однако практически не изучены подобные соединения с меньшим содержанием мочевины. Целью настоящей работы является продолжение поиска закономерностей образования и строения комплексов различных элементов с мочевиной.</p></sec><sec><title>Методы</title><p>Методы. Новые координационные соединения синтезированы и охарактеризованы методами рентгенофазового анализа, инфракрасной спектроскопии и рентгеноструктурного анализа.</p></sec><sec><title>Результаты</title><p>Результаты. Взаимодействие нитратов гадолиния и эрбия с карбамидом (мочевиной, Ur) в водном растворе в условиях недостатка лиганда приводит к образованию ранее неизвестных координационных соединений цис-[In(Ur)4(NO3)2]NO3, [Gd(H2O)2(Ur)2(NO3)3] и [Er(H2O)2(Ur)(NO3)3]. Показано, что комплекс индия имеет ионное, а комплексы гадолиния и эрбия ― молекулярное строение. Координационное число индия равно 6; комплексный катион имеет октаэдрическое строение с цис-расположением двух монодентатных нитратных групп. Вершины октаэдра заняты атомами кислорода четырех монодентатных молекул карбамида. Координационное число гадолиния равно 10, координационный полиэдр можно представить как искаженную пентагональную пирамиду, в вершинах которой расположены две молекулы воды, а в плоскости ― две мондентатные молекулы мочевины и три бидентатно-хелатирующие нитратные группы, ориентированные перпендикулярно плоскости бипирамиды. Координационное число эрбия равно 9, координационный полиэдр ― искаженная трехшапочная тригональная призма.</p></sec><sec><title>Выводы</title><p>Выводы. При переходе от гадолиния к эрбию наблюдается координация одной молекулы мочевины вместо двух, координационное число уменьшается от 10 до 9. В комплексе индия координационное число равно шести; в отличие от комплексов гадолиния и эрбия комплексный катион не содержит воды, а нитратные группы являются не бидентатными, а монодентатными.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>нитрат индия</kwd><kwd>нитрат гадолиния</kwd><kwd>нитрат эрбия</kwd><kwd>карбамид</kwd><kwd>комплексы</kwd><kwd>кристаллическая структура</kwd><kwd>рентгеноструктурный анализ</kwd></kwd-group><kwd-group xml:lang="en"><kwd>indium nitrate</kwd><kwd>gadolinium nitrate</kwd><kwd>erbium nitrate</kwd><kwd>urea</kwd><kwd>complexes</kwd><kwd>crystal structure</kwd><kwd>X-ray diffraction analysis</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена с использованием оборудования  ЦКП РТУ МИРЭА, ЦКП ФМИ ИОНХ РАН и ЦКП «ИРЕА-Курчатовский институт» при поддержке Министерства науки и высшего образования Российской Федерации.</funding-statement><funding-statement xml:lang="en">The study was performed using the equipment of the Center for Shared Use at the MIREA – Russian Technological University, the Research Equipment Sharing Center of Physical Methods for Studying Substances and Materials at the Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, and the Center for Shared Use at the Kurchatov Institute National Research Center—IREA with the support of the Ministry of Science and Higher Education of the Russian Federation.</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">Varma A., Mukasyan A.S., Rogachev A.S., Manukyan K.V. 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