Hexakis(trialkylsilyl)cyclotrisilanes and photochemical generation of bis(trialkylsilyl)silylenes

Autor:	Toyotaro Maruyama, Takeaki Iwamoto, Dongzhu Yin, Tsuyoshi Kuzuguchi, Chizuko Kabuto, Hideki Sakurai, Mitsuo Kira
Rok vydání:	2002
Předmět:	Stereospecificity Chemistry Stereochemistry Reagent Photodissociation General Chemistry Ground state Medicinal chemistry
Zdroj:	Scopus-Elsevier
ISSN:	1364-5447 1472-7773
Popis:	Hexakis(trialkylsilyl)cyclotrisilanes 1a (trialkylsilyl = tert-butyldimethylsilyl) and 1b (trialkylsilyl = diisopropylmethylsilyl) were synthesized by the reductive coupling of the corresponding 2,2-dibromotrisilanes. Their molecular structures were confirmed by X-ray crystallography. In the absence of trapping reagents, photolysis of cyclotrisilanes 1a and 1b gave the corresponding stable tetrakis(trialkylsilyl)disilenes quantitatively. Irradiation of cyclotrisilanes 1a and 1b in (Z)-2-butene and (E)-2-butene afforded exclusively the corresponding (Z)- and (E)-2,3-dimethyl-1-silacyclopropanes, respectively. Stereospecific formation of the cycloadducts indicates that the bis(trialkylsilyl)silylenes generated from cyclotrisilanes 1a and 1b would be singlets in the ground state.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3323532af2e4ec9d1d44adfacb36103b https://doi.org/10.1039/b107905k Zobrazit plný text záznamu