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New copper(II) tetramer with arylhydrazone of barbituric acid and its catalytic activity in the oxidation of cyclic C5–C8 alkanesстатья
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: 28 октября 2016 г.
- Авторы: Sutradhar Manas, Alegria Elisabete C.B.A, Barman Tannistha Roy, Fátima C Guedes Silva M., Mahmudov Kamran T., Guseinov Firudin I., Pombeiro Armando J.L.
- Журнал: Polyhedron
- Том: 117
- Год издания: 2016
- Издательство: Pergamon Press
- Местоположение издательства: United States
- Первая страница: 666
- Последняя страница: 671
- DOI: 10.1016/j.poly.2016.07.002
- Аннотация: 2-(2-(2,4,6-Trioxotetrahydropyrimidin-5(2H)-ylidene)hydrazinyl)terephthalic acid (H5L) was synthesized by azocoupling of diazonium salts of 2-aminoterephthalic acid with barbituric acid and characterized by IR, 1H and 13C NMR spectroscopies and ESI-MS analysis. In solution and solid state, H5L exists in the hydrazone form. The reaction of H5L with copper(II) nitrate hydrate in methanol affords the tetramer species [Cu2(l2-1jNOO0:2jO0O00-H3L)2]2 (1) where carboxylate groups bridge two Cu(II) centers in a bridging chelate l2-(O,O0,O0) fashion, giving rise to a cyclic Cu4O4 core. A rare and intense intermolecular non-covalent interaction of the type Ocarboxylic(lone pair) p(pyrimidine), with O centroid distance of 2.705 Å, was found in 1. In addition, medium intense NAH O and OAH O contacts expand the structure to a 3D network. Compound 1 behaves as efficient catalyst in the mild oxidation, by aqueous H2O2 in acidic MeCN/H2O media, of different cyclic C5–C8 alkanes to produce the corresponding alcohols and ketones. Overall product yields up to ca. 25% (based on alkane) were achieved.
- Добавил в систему: Гусейнов Фирудин Ильясович