First 4,7-oxygenated 1,10-phenanthroline 2,9-diamides: synthesis, tautomerism and complexation with REE nitrates

Avagyan, N.A.; Lemport, P.S.; Roznyatovsky, V.A.; Averin, A.D.; Yakushev, A.A.; Lyssenko, K.A.; Perfilyev, P.; Isakovskaya, K.L.; Aksenova, S.A.; Nelyubina, Y.V.; Vokuev, M.F.; Rodin, I.А.; Gloriozov, I.P.; Ustynyuk, Y.A.; Nenajdenko, V.G.

Авторы: Avagyan N.A., Lemport P.S., Roznyatovsky V.A., Averin A.D., Yakushev A.A., Lyssenko K.A., Perfilyev P., Isakovskaya K.L., Aksenova S.A., Nelyubina Y.V., Vokuev M.F., Rodin I.А., Gloriozov I.P., Ustynyuk Y.A., Nenajdenko V.G.
Журнал: Dalton Transactions
Том: 7
Номер: 53
Год издания: 2024
Издательство: Royal Society of Chemistry
Местоположение издательства: United Kingdom
Первая страница: 3052
Последняя страница: 3064
DOI: 10.1039/d3dt03643j
Аннотация: A new family of phenanthroline ligands was prepared. Hydrolysis of 4,7-dihalogenated 1,10-phenanthroline-2,9-diamides in acidic media leads to the corresponding 4,7-oxygenated derivatives. These ligands can exist in different tautomeric forms. The tautomerism of 4,7-oxygenated phenanthroline diamides has been investigated using quantum chemical calculations. Unsymmetrical oxo-hydroxy tautomeric form was proved to be the most energetically advantageous according to spectral data and X-ray analysis. It was shown that 4,7-difluoro derivatives undergo acid hydrolysis more easily when compared to 4,7-dichloro derivatives. A coordination chemistry of 4,7-oxygenated 1,10-phenanthroline-2,9-diamides toward some lanthanide nitrates was investigated. The structures of Ln-complexes thus formed were studied both in the solid state and in solution (XRD analysis, IR, NMR and UV spectroscopy). It was revealed that 4,7-oxygenated ligands adopt dihydroxy tautomeric form upon coordination with lanthanide nitrates.
Добавил в систему: Авакян Нанэ Арменовна

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First 4,7-oxygenated 1,10-phenanthroline 2,9-diamides: synthesis, tautomerism and complexation with REE nitratesстатья

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