Lithium Tetra(pentafluorophenyl)borate

Encyclopedia of Reagents for Organic Synthesis Pub Date : 2007-09-17 DOI:10.1002/047084289X.RN00752

Katsunori Tanaka, K. Fukase

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Abstract

[2797-28-6] C24BF20Li (MW 685.98) InChI = 1S/C24BF20.Li/c26-5-1(6(27)14(35)21(42)13(5)34)25(2-7(28)15(36)22(43)16(37)8(2)29,3-9(30)17(38)23(44)18(39)10(3)31)4-11(32)19(40)24(45)20(41)12(4)33;/q-1;+1 InChIKey = WTTFKRRTEAPVBI-UHFFFAOYSA-N (reagent especially used for generating “free” acid catalysts with a noncoordinating (C6F5)4B− ligand) Alternative Name: lithium tetrakis(pentafluorophenyl)borate. Physical Data: mp 120–124 °C (measured for diethylether complex, LiB(C6F5)4·2.5(Et2O)). Solubility: soluble in diethyl ether, MeOH, and H2O. Form Supplied in: commercially available as a diethyl ether complex (white powder). Analysis of Reagent Purity: IR, elemental analysis. Preparative Methods and Purification: LiB(C6F5)4 1 is prepared by the reaction of tris(pentafluorophenyl)borane [B(C6F5)3] with lithium pentafluorobenzene (LiC6F5) in pentane at −78 °C.1, 2 Filtration of the white precipitate provides the salt 1 (white powder) sufficiently pure for elemental analysis. LiC6F5 is prepared from bromopentafluorobenzene (BrC6F5) and n-BuLi in pentane. Handling, Storage, and Precautions: should be stored in a dry, dark, and cold place. Not to be exposed to oxidants, acids, and bases.

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锂硼酸利乐(pentafluorophenyl)

[2797-28-6] C24BF20Li (MW 685.98) InChI = 1S/C24BF20.Li/c26-5-1(6(27)14(35)21(42)13(5)34)25(2-7(28)15(36)22(43)16(37)8(2)29,3-9(30)17(38)23(44)18(39)10(3)31)4-11(32)19(40)24(45)20(41)12(4)33;/q-1;+1 InChIKey = wttfkrr紫砂酸锂(uhfffaoysa - n)(特别用于生成具有非配位(C6F5)4B -配体的“游离”酸催化剂的试剂)物理数据:mp 120-124°C(测量二乙醚配合物，LiB(C6F5)4·2.5(Et2O))。溶解度:溶于乙醚、甲醇和水。供应形式:市售的乙醚络合物(白色粉末)。试剂纯度分析:IR，元素分析。制备方法及纯化:以三(五氟苯基)硼烷[B(C6F5)3]与五氟苯锂(LiC6F5)在戊烷中，在- 78℃下反应制备LiB(C6F5) 41。1,2白色沉淀物的过滤使盐1(白色粉末)足够纯净，可用于元素分析。LiC6F5是由溴五氟苯(BrC6F5)和正丁烯在戊烷中合成的。处理、贮存及注意事项:应贮存于干燥、避光、避冷处。不暴露于氧化剂、酸和碱中。

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Encyclopedia of Reagents for Organic Synthesis

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