|
ИСТИНА |
Войти в систему Регистрация |
ИСТИНА ЦЭМИ РАН |
||
Electrochemical synthesis, structural characterization, and decomposition of rhenium oxoethoxide, Re4O4(OEt)(12). Ligand influence on the structure and bonding in the high-valent tetranuclear planar rhenium alkoxide clustersстатья
Статья опубликована в высокорейтинговом журнале
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: 18 июля 2013 г.
- Авторы: Nikonova Olesya A., Jansson Kjell, Kessler Vadim G., Sundberg Margareta, Baranov Alexei I., Shevelkov Andrei V., Drobot Dmitrii V., Seisenbaeva Gulaim A.
- Журнал: Inorganic Chemistry
- Том: 47
- Номер: 4
- Год издания: 2008
- Издательство: American Chemical Society
- Местоположение издательства: United States
- Первая страница: 1295
- Последняя страница: 1300
- DOI: 10.1021/ic701781k
- Аннотация: Anodic oxidation of rhenium in ethanol in the presence of LiCl as a conductive additive results with high yield in formation of a new oxoethoxide cluster, Re4O4(OEt)(12). The structure of the planar centrosymmetric metal-oxygen core of this molecule is composed of four edge-sharing Re(V)O-6 octahedra. Eight electrons are available for the formation of metal-metal bonds indicated by five relatively short Re-Re distances within the Re-4-rhombus, a "planar butterfly" type cluster. The theoretical calculations are indicating relatively low contribution of metal-metal bonding in the stability of the core. The stability of the +V-oxidation state, unusual for rhenium alkoxides can be at least partially attributed to the size effects in the packing of ligands. The X-ray powder study indicates that treatment of Re4O4(OEt)(12) in ambient atmosphere rapidly transforms it into a mixed-valence derivative Re4O6(OEt)(10) with a structure related to the earlier investigated cluster Re4O6((OPr)-Pr-i)(10). Thermal decomposition of the latter rhenium oxoethoxide results in reduction to rhenium metal at as low temperatures as 380 degrees C, producing aggregates of metal nanoparticles with the average size of 3 nm.
- Добавил в систему: Шевельков Андрей Владимирович