کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1325902 | 977409 | 2008 | 10 صفحه PDF | دانلود رایگان |
Several new 1,1-disubstituted siloles containing substituents on the ring carbon atoms have been synthesized. The new siloles: 1,1-dihydrido-2,5-bis(trimethylsilyl)-3,4-diphenylsilole (5), 1,1-dihydrido-2,5-dimethyl-3,4-diphenylsilole (6), 1,1-dimethoxy-2,5-bis(trimethylsilyl)-3,4-diphenylsilole (7), 1,1-bis(4-methoxyphenyl)-2,5-bis(trimethylsilyl)-3,4-diphenylsilole (8), 1,1-dipropoxy-2,5-bis(trimethylsilyl)-3,4-diphenylsilole (9), and 1,1-dibromo-2,5-bis(trimethylsilyl)-3,4-diphenylsilole (13) were prepared from reactions originating from the previously reported, 1,1-bis(diethylamino)-2,5-bis(trimethylsilyl)-3,4-diphenylsilole (1) or 1,1-bis(diethylamino)-2,5-dimethyl-3,4-diphenylsilole (2). In addition, three other new organosilane byproducts were observed and isolated during the current study, bis(4-methoxyphenyl)bis(phenylethynyl)silane (11), bis(4-methoxyphenyl)di(propoxy)silane (12) and 1-bromo-4-bromodi(methoxy)silyl-1,4-bis(trimethylsilyl)-3,4-diphenyl-1,3-butadiene (14). Compounds 13 and 14 were characterized by X-ray crystallography and 14 is the first 1,1-dibromosilole whose solid state structure has been determined.
A series of 1,1-disubstituted silacyclopentadienes has been prepared by a variety of reactions utilizing the known 1,1-(diethylamino)-2,5-bis(trimethylsilyl)-3,4-diphenylsilole or related 1,1-bis(diethylamino)-2,5-dimethyl-3,4-diphenylsilole. Several other new silicon-containing byproducts were produced from reactions of the siloles that took unexpected pathways. The first molecular structure of a 1,1-dibromo-substituted silole was determined by X-ray crystallography.Figure optionsDownload as PowerPoint slide
Journal: Journal of Organometallic Chemistry - Volume 693, Issue 7, 1 April 2008, Pages 1233–1242