From Chemistry Towards Technology Step-By-Step From Chemistry Towards Technology Step-By-Step От химии к технологии шаг за шагом 2782-1900 96864 10.52957/2782-1900-2025-6-1-74-80 Научные статьи Scientific articles Научные статьи Properties of 4-nitrosopyrazoles with perfluoroalkyl substituent Properties of 4-nitrosopyrazoles with perfluoroalkyl substituent Роот Евгений Владимирович Root Evgeny Vladimirovich rootev@mail.ru

кандидат химических наук;

candidate of chemical sciences;

 Кукушкин Алексей Александрович Kukushkin Alexey Aleksandrovich alekseykukushkin@bk.ru

кандидат химических наук;

candidate of chemical sciences;

 Волкова Дарья Сергеевна Volkova Daria Sergeevna dasha_21_dasha@mail.ru Кучина Ксения Юрьевна Kuchina Ksenia Yurievna ku4ina.ksusha@ya.ru Полиенко Татьяна Викторовна Polienko Tatiana Viktorovna polienkot27@mail.ru https://orcid.org/0000-0002-1156-9644 Оберенко Андрей Витальевич Oberenko Andrey Vitalievich aoberenko@sfu-kras.ru Сибирский государственный университет науки и технологий имени академика М.Ф. Решетнева Красноярск Россия Сибирский государственный университет науки и технологий имени академика М.Ф. Решетнева Красноярск Russian Federation Красноярский государственный медицинский университет им. проф. В.Ф.Войно‐Ясенецкого Krasnoyarsk V.F. Voino‐Yasenetsky State Medical University Сибирский федеральный университет Siberian Federal University АНОО ВО «Университет «Сириус» федеральная территория «Сириус» Россия АНОО ВО «Университет «Сириус» федеральная территория «Сириус» Russian Federation Федеральное государственное бюджетное образовательное учреждение высшего образования «Сибирский государственный университет науки и технологий имени академика М.Ф. Решетнева» Красноярск Россия Reshetnev Siberian State University of Science and Technology Krasnoyarsk Russian Federation Сибирский государственный университет науки и технологий имени академика М.Ф. Решетнева Россия Сибирский государственный университет науки и технологий имени академика М.Ф. Решетнева Russian Federation Сибирский федеральный университет Красноярск Россия Siberian Federal University Krasnoyarsk Russian Federation 28 03 2025 28 03 2025 6 1 74 80 08 11 2024 13 02 2025 https://chemintech.ru/en/nauka/article/96864/view

The paper investigates the structure and physicochemical properties of nitrosopyrazoles with perfluoroalkyl substituents. The authors pay special attention to the effect of fluorine atoms on the physicochemical properties of compounds and their acidity. IR spectroscopy confirms the existence of the dimer of 4-nitrosopyrazoles. In establishing the structure of the mass spectrum fragmentation ions, we assumed an aziridine rearrangement accompanying the decomposition of the compounds. The authors determined pKa for the synthesised hydroxyimino-β-diketones and nitrosopyrazoles by spectrophotometric method. Moreover, the authors determined the optical density of the solutions on a spectrophotometer and the acidity constant by graphical and analytical methods

The paper investigates the structure and physicochemical properties of nitrosopyrazoles with perfluoroalkyl substituents. The authors pay special attention to the effect of fluorine atoms on the physicochemical properties of compounds and their acidity. IR spectroscopy confirms the existence of the dimer of 4-nitrosopyrazoles. In establishing the structure of the mass spectrum fragmentation ions, we assumed an aziridine rearrangement accompanying the decomposition of the compounds. The authors determined pKa for the synthesised hydroxyimino-β-diketones and nitrosopyrazoles by spectrophotometric method. Moreover, the authors determined the optical density of the solutions on a spectrophotometer and the acidity constant by graphical and analytical methods

 nitroso compounds; acidity constant; NMR spectroscopy; chromatography-mass spectrometry; perfluoroalkyl substituents nitroso compounds; acidity constant; NMR spectroscopy; chromatography-mass spectrometry; perfluoroalkyl substituents

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