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Trimethylacetate-bridged mixed-valence binuclear vanadium(IV,V) complexes with a {(VO)(2)(µ-O)}3+ coreстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 25 ноября 2020 г.
- Авторы: Bazhina Evgeniya S., Aleksandrov Grigory G., Kiskin Mikhail A., Nikitin Oleg M., Efimov Nikolay N., Ugolkova Elena A., Minin Vadim V., Magdesieva Tatiana V., Sidorov Aleksey A., Eremenko Igor L.
- Журнал: Polyhedron
- Том: 175
- Год издания: 2020
- Издательство: Pergamon Press
- Местоположение издательства: United States
- Номер статьи: 114212
- DOI: 10.1016/j.poly.2019.114212
- Аннотация: The reaction of an oxidovanadium(IV) salt with an N-donor ligand (2,2'-bipyridine (bpy) or 4,4'-di-tert-butyl-2,2'-bipyridine (dtb-bpy)) and M(piv) (M = Li, K, NBu4; piv = (CH3)3CCO2-) in a ratio of 1 : 1 : 2 affords complexes [(VO)2(µ-OH)(µ-piv)2(bpy)2](otf) (1), [(VO)2(µ-O)(µ-piv)2(dtb-bpy)2](otf)·H2O (2), or [(VO)2(µ-O)(µ-piv)2(bpy)2](NO3)·Hpiv·H2O (3), respectively (piv = (CH3)3CCO2-, otf = CF3SO3-). According to single-crystal X-ray diffraction, the complexes contain two vanadium atoms bridged by two carboxylate groups and one hydroxo (1) or oxo (2, 3) group. Cyclic voltammetry revealed that both vanadium atoms in 1 have oxidation state +4, whereas one of the two metal atoms in 2 and 3 has oxidation state +4 and another one has +5. The room-temperature EPR spectrum of complex 2 in solution is indicative of delocalization of an unpaired electron between two equivalent metal atoms. In frozen glass (77 K) the electron is localized on one center.
- Добавил в систему: Бажина Евгения Сергеевна