An Aliphatic Solvent-Soluble Lithium Salt of the Perhalogenated Weakly Coordinating Anion [Al(OC(CCl3)(CF3)2)4]−,Inorganic Chemistry

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An Aliphatic Solvent-Soluble Lithium Salt of the Perhalogenated Weakly Coordinating Anion [Al(OC(CCl3)(CF3)2)4]−
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2016-01-19 00:00:00 , DOI: 10.1021/acs.inorgchem.5b02674
Xin Zheng ₁ , Zaichao Zhang ₂ , Gengwen Tan ₁ , Xinping Wang ₁

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The facile synthesis of a new highly aliphatic solvent-soluble Li⁺ salt of the perhalogenated weakly coordinating anion [Al(OC(CCl₃)(CF₃)₂)₄]⁻ and its application in stabilizing the Ph₃C⁺ cation were investigated. The lithium salt Li[Al(OC(CCl₃)(CF₃)₂)₄] (4) was prepared by the treatment of 4 mol equiv of HOC(CCl₃)(CF₃)₂ with purified LiAlH₄ in n-hexane from −20 °C to room temperature. Compound 4 is highly soluble in both polar and nonpolar solvents, and it bears both CCl₃ and CF₃ groups, resulting in a lower symmetry around the Al center compared to that of Li[Al(OC(CF₃)₃)₄] (1). Treatment of 4 with Ph₃CCl afforded the ionic compound [Ph₃C][Al(OC(CCl₃)(CF₃)₂)₄] (5) bearing the Ph₃C⁺ cation with concomitant elimination of LiCl, suggesting the potential application of [Al(OC(CCl₃)(CF₃)₂)₄]⁻ in stabilizing reactive cationic species. Compounds 4 and 5 were fully characterized by spectroscopic and structural methods.

中文翻译：

全卤化弱配位阴离子的脂族溶剂可溶性锂盐[铝（OC（CCL ₃）（CF ₃）₂）₄ ] ^-

研究了全卤化的弱配位阴离子[Al（OC（CCl ₃）（CF ₃）₂）₄ ] ^-的新型高脂族溶剂可溶性Li ⁺盐的简便合成及其在稳定Ph ₃ C ⁺阳离子中的应用。锂盐Li [Al（OC（CCl ₃）（CF ₃）₂）₄ ]（4）的制备方法是：用纯净的LiAlH ₄在n中处理4摩尔当量的HOC（CCl ₃）（CF ₃）₂。--20°C至室温的正己烷。化合物4在极性和非极性溶剂中均高度溶解，并且同时具有CCl ₃和CF ₃基团，与Li [Al（OC（CF（CF ₃）₃）₄ ]（1）。的治疗4的Ph ₃四氯化碳，得到的离子性化合物[PH ₃ C] [铝（OC（CCL ₃）（CF ₃）₂）₄ ]（5）轴承博士₃ Ç ⁺阳离子并伴有LiCl的消除，表明[Al（OC（CCl ₃）（CF ₃）₂）₄ ] ^-在稳定反应性阳离子物质中的潜在应用。通过光谱和结构方法充分表征了化合物4和5。

更新日期：2016-01-19

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