<article 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" article-type="research-article" dtd-version="1.2" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Coordination Chemistry</journal-id><journal-title-group><journal-title>Russian Journal of Coordination Chemistry</journal-title></journal-title-group><issn publication-format="print">0132-344X</issn><issn publication-format="electronic">3034-5499</issn><publisher><publisher-name>Russian Academy of Science</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.7868/S3034549925010046</article-id><title-group><article-title>Influence of Noncovalent Se∙∙∙Se, N∙∙∙P, and Se∙∙∙H Interactions nn the Structures of 1,4-Bis(phenylselenyl)-3a,6a-diaza-1,4-diphosphapentalene in Crystal and Solution</article-title><trans-title-group xml:lang="ru"><trans-title>ВЛИЯНИЕ НЕКОВАЛЕНТНЫХ ВЗАИМОДЕЙСТВИЙ Se∙∙∙Se, N∙∙∙P, Se∙∙∙H НА СТРУКТУРУ 1,4-бис(ФЕНИЛСЕЛЕНИЛ)-3a,6a-ДИАЗА-1,4-ДИФОСФАПЕНТАЛЕНА В КРИСТАЛЛЕ И РАСТВОРЕ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Sushev</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Сущев</surname><given-names>В. В. </given-names></name></name-alternatives><email>sushev_noemail@ras.ru</email><xref ref-type="aff" rid="aff-1"></xref><xref ref-type="aff" rid="aff-2"></xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Zolotareva</surname><given-names>N. V.</given-names></name><name xml:lang="ru"><surname>Золотарева</surname><given-names>Н. В. </given-names></name></name-alternatives><email>zolotareva_noemail@ras.ru</email><xref ref-type="aff" rid="aff-3"></xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Grishin</surname><given-names>M. D.</given-names></name><name xml:lang="ru"><surname>Гришин</surname><given-names>М. Д. </given-names></name></name-alternatives><email>grishin_noemail@ras.ru</email><xref ref-type="aff" rid="aff-5"></xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Rumyantcev</surname><given-names>R. V.</given-names></name><name xml:lang="ru"><surname>Румянцев</surname><given-names>Р. В. </given-names></name></name-alternatives><email>rumyantcev_noemail@ras.ru</email><xref ref-type="aff" rid="aff-7"></xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Fukin</surname><given-names>G. K.</given-names></name><name xml:lang="ru"><surname>Фукин</surname><given-names>Г. К. </given-names></name></name-alternatives><email>fukin_noemail@ras.ru</email><xref ref-type="aff" rid="aff-9"></xref></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid"></contrib-id><name-alternatives><name xml:lang="en"><surname>Kornev</surname><given-names>A. N.</given-names></name><name xml:lang="ru"><surname>Корнев</surname><given-names>А. Н. </given-names></name></name-alternatives><email>akornev@iomc.ras.ru</email><xref ref-type="aff" rid="aff-11"></xref></contrib></contrib-group><aff-alternatives id="aff-1"><aff><institution xml:lang="ru">Институт металлоорганической химии им. Г. А. Разуваева РАН</institution><institution xml:lang="en">Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff><institution xml:lang="ru"></institution><institution xml:lang="en"></institution></aff></aff-alternatives><aff-alternatives id="aff-3"><aff><institution xml:lang="ru">Институт металлоорганической химии им. Г. А. Разуваева РАН</institution><institution xml:lang="en">Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences</institution></aff></aff-alternatives><aff-alternatives id="aff-5"><aff><institution xml:lang="ru">Институт металлоорганической химии им. Г. А. Разуваева РАН</institution><institution xml:lang="en">Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences</institution></aff></aff-alternatives><aff-alternatives id="aff-7"><aff><institution xml:lang="ru">Институт металлоорганической химии им. Г. А. Разуваева РАН</institution><institution xml:lang="en">Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences</institution></aff></aff-alternatives><aff-alternatives id="aff-9"><aff><institution xml:lang="ru">Институт металлоорганической химии им. Г. А. Разуваева РАН</institution><institution xml:lang="en">Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences</institution></aff></aff-alternatives><aff-alternatives id="aff-11"><aff><institution xml:lang="ru">Институт металлоорганической химии им. Г. А. Разуваева РАН</institution><institution xml:lang="en">Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-11-12" publication-format="electronic"><day>12</day><month>11</month><year>2025</year></pub-date><volume>51</volume><issue>1</issue><fpage>32</fpage><lpage>40</lpage><abstract xml:lang="en"><p>The reaction of annelated 1,4-dichloro-3a,6a-diaza-1,4-diphosphapentalene (DDPCl2, I) with 2 equivalents of lithium phenyl selenolate (PhSeLi) results in the substitution of the chlorine atoms by the PhSe group and formation of exclusively cis isomer of annelated 1,4-bis(phenylselenyl)-3a,6a-diaza-1,4-diphosphapentalene (II) according to the XRD data. The noncovalent Se···Se interaction (3.968 Е) is observed in the crystal of compound II. The cis-II isomer is by 6.0 kcal/mol thermodynamically more favorable than trans-I according to the DFT/B3LYP/6-31G(d) calculations. The cis-1,4-bis(phenylselenyl) and 1,1-bis(phenylselenyl) isomers (the latter is formed due to the easy migration of the PhSe group) are equilibrated in the solution. Noncovalent N∙∙∙P and Se∙∙∙H interactions participate in the stabilization of the 1,1-isomer. The crystallographic structural information is available at the Cambridge Crystallographic Data Centre (CIF file CCDC no. 2357640).</p></abstract><trans-abstract xml:lang="ru"><p>Взаимодействие аннелированного 1,4-дихлор-3a,6a-диаза-1,4-дифосфапенталена (DDPCl2. I) с 2 экв. фенилселенолята лития (PhSeLi) приводит к замещению атомов хлора на PhSe-группу и образованию исключительно цис-изомера аннелированного 1,4-бис(фенилселенил)-3a,6a-диаза-1,4-дифосфапенталена (II) согласно данным РСА. В кристалле II обнаружено нековалентное взаимодействие Se···Se 3.968 Å. Цис-изомер II оказался на 6.0 ккал/моль термодинамически более выгодным, чем транс-I, согласно расчетам методом DFT/B3LYP/6-31G(d). В растворе существует равновесие между цис-1,4-бис(фенилселенил)- и 1,1-бис(фенилселенил)-формой, образующейся благодаря легкой миграции PhSe-группы. В стабилизации 1,1-изомера принимают участие нековалентные взаимодействия N∙∙∙P, Se∙∙∙H. Кристаллографическая информация для структуры (CCDC № 2357640).</p></trans-abstract><kwd-group xml:lang="en"><kwd>диазадифосфапенталены диазафосфолы двухкоординированный фосфор нековалентные взаимодействия селен-селен</kwd><kwd>азот-фосфор</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>диазадифосфапенталены диазафосфолы двухкоординированный фосфор нековалентные взаимодействия селен-селен</kwd><kwd>азот-фосфор</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Работа выполнена в рамках госзадания FFSE-2023-0003 по теме “Рациональный дизайн, новые аспекты строения, физико-химических свойств и реакционной способности элементоорганических соединений” (№ 123031000054-5) с использованием научного оборудования Центра коллективного пользования “Аналитический центр ИМХ РАН” при поддержке гранта “Обеспечение развития материально-технической инфраструктуры центров коллективного пользования научным оборудованием”.</funding-statement></funding-group><funding-group xml:lang="en"><funding-statement>Работа выполнена в рамках госзадания FFSE-2023-0003 по теме “Рациональный дизайн, новые аспекты строения, физико-химических свойств и реакционной способности элементоорганических соединений” (№ 123031000054-5) с использованием научного оборудования Центра коллективного пользования “Аналитический центр ИМХ РАН” при поддержке гранта “Обеспечение развития материально-технической инфраструктуры центров коллективного пользования научным оборудованием”.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>B1</label><citation-alternatives><mixed-citation xml:lang="ru">Kornev A.N., Sushev V.V., Panova Yu.S. et al. // Inorg. 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