首页> 外文期刊>Chemistry: A European journal >How Trimethyl(trifluoromethyl)silane Reacts with Itself in the Presence of Naked Fluoride-A One-Pot Synthesis of Bis([15]crown-5)cesium 1,1,1,3,5,5,5-Heptatluoro-2,4-bis(trifluoromethyl)pentenide
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How Trimethyl(trifluoromethyl)silane Reacts with Itself in the Presence of Naked Fluoride-A One-Pot Synthesis of Bis([15]crown-5)cesium 1,1,1,3,5,5,5-Heptatluoro-2,4-bis(trifluoromethyl)pentenide

机译:三甲基(三氟甲基)硅烷在裸露的氟化物存在下如何反应-一锅法合成双([15] cro-5)铯1,1,1,3,5,5,5-Heptatluoro-2, 4-双(三氟甲基)戊烯

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摘要

Reactions of trimethyl(tri-fluoromethyl)silane in the presence of "naked" fluoride proceed up to a temperature of +5 deg C mainly with formation of [Me_3Si(CF_3)_2]~-.A further rise of temperature up to about 20 deg C gives evidence for the formation of a salt with the 1,1,1,2,3,6,6,6-octafluoro-2,4,4,5,5-pentakis(trifluoromethyl)hexan-3-ide anion.This intermediate decomposes at room temperature into the 1,1,1,3,5,5,5-heptafluoro-2,4-bis(tri-fluoromethyl)pentenide anion.The bis([15]crown-5)cesium salt,[Cs([15]-crown-5)_2][(CF_3)_2CCFC(CF_3)_2] has been characterized unambiguously as the stable final product of this reaction sequence.Thermal decomposition of this salt opens a convenient nontoxic route to obtain 1,1,3,3-tetrakis(trifluo-romethyl)allene,(F_3C)_2C=C=C(CF_3)_2.
机译:三甲基(三氟甲基)硅烷在“裸露”氟化物存在下的反应进行到+5℃,主要是形成[Me_3Si(CF_3)_2]〜-。温度进一步升高到约20 ℃提供了与1,1,1,2,3,6,6,6-八氟-2,4,4,5,5-五(三氟甲基)己-3-阴离子阴离子形成盐的证据该中间体在室温下分解为1,1,1,3,5,5,5-七氟-2,4-双(三氟甲基)戊烯阴离子。双([15] cro-5)铯盐,[Cs([15] -crown-5)_2] [(CF_3)_2CCFC(CF_3)_2]的明确特征是该反应序列的稳定终产物。该盐的热分解为获得该盐提供了方便的无毒途径1,1,3,3-四(三氟甲基)丙二烯,(F_3C)_2C = C = C(CF_3)_2。

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