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Copper/sodium-directed hydrolytic condensation of methyltriethoxysilane: Self-assembly of polyhedral Cu/Na-methylsiloxane. Synthesis and properties of new stereoregular macrocyclosiloxaneстатья
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Дата последнего поиска статьи во внешних источниках: 24 октября 2016 г.
- Авторы: Molodtsova Yulia A., Lyssenko Konstantin A., Blagodatskikh Inesa V., Matukhina Elena V., Peregudov Alexander S., Buzin Michael I., Vasil'ev Victor G., Katsoulis Dimitris E., Shchegolikhina Olga I.
- Журнал: Journal of Organometallic Chemistry
- Том: 693
- Номер: 10
- Год издания: 2008
- Издательство: Elsevier BV
- Местоположение издательства: Netherlands
- Первая страница: 1797
- Последняя страница: 1807
- DOI: 10.1016/j.jorganchem.2008.02.002
- Аннотация: A hydrolytic condensation of methyltriethoxysilane was performed in the presence of sodium and copper ions. A crystalline copper/sodium-methylsiloxane of a general formula {Na(4)[(MeSi(O) O)(12)Cu(4)]} center dot 6(n-BuOH) (1a) was obtained as the only product in a high yield. X-ray analysis of a single crystal obtained after recrystallization of 1a by slow diffusion of methanol vapours into its ethanol solution was characterised as {Na(4)[(MeSi(O) O)(12)Cu(4)]} center dot 4(MeOH) center dot 4(EtOH) (1b). In the crystal molecules are assembled into zig-zag chains by O-H H center dot center dot center dot O bonds. Removal of metal ions by a reaction of 1a or 1b with Me(3)SiCl gave a new siloxane macrocycle tris-cis-tris-trans-dodecamethyldodecatrimethylsiloxycyclododecasiloxane, [MeSi(O)OSiMe(3)](12) (2), in a high yield. (C) 2008 Elsevier B. V. All rights reserved.
- Добавил в систему: Благодатских Инэса Васильевна