Synthesis and characterization of functional cyclopentasilanes

Autor:	A. Spielberger, P. K. Jenkner, Edwin Hengge
Rok vydání:	1992
Předmět:	chemistry.chemical_compound Sodium ethoxide chemistry Acetyl chloride Halogen Organic chemistry General Chemistry Ring (chemistry) Cleavage (embryo) Characterization (materials science)
Zdroj:	Heteroatom Chemistry. 3:443-447
ISSN:	1098-1071 1042-7163
DOI:	10.1002/hc.520030421
Popis:	Cleavage of the exocyclic Si-Si-bond of phenyldimethysilylnonamethylcyclopentasilane 3 by sodium ethoxide followed by chlorination with acetyl chloride leads to the monofunctional chlorononamethylcyclopentasilane 5. Subsequent hydration gives hydrononamethylcyclopentasilane 6, which can be easily converted to the corresponding bromo and iodo derivatives 7, 8. Fluorononamethylcyclopentasilane can be prepared upon treatment of 7 with ZnF2. A different but convenient synthetic pathway to the halononamethylcyclopentasilanes has also been achieved employing the corresponding trifluoromethanesulfonic acid ester 11. The halogen derivatives—as expected—show a strong influence on the physical properties of the compounds. These functionalized cyclopentasilanes may serve as useful synthetic tools in building larger oligosilane ring systems.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6f18cc89ae51e2a4918f955b06431a35 https://doi.org/10.1002/hc.520030421 Zobrazit plný text záznamu