The New Fluoro-tris(pentafluoroethyl)borate Anion [(C2F5)3BF]?, Unexpected Formation of [(C2F5)3BH]? as a By-ProductDas neue Fluoro-tris(pentafluoroethyl)borat Anion [(C2F5)3BF]?, unerwartete Bildung des Nebenprodukts [(C2F5)3BH]?
作者:Gottfried Pawelke、Helge Willner
DOI:10.1002/zaac.200400447
日期:2005.3
Dimethylamine-tris(pentafluoroethyl)borane (C2F5)3B · NHMe2 (1) has been obtained from C2F5I, Br2BNMe2 and tris(diethylamino)phosphane in sulfolane. Alkylation using CH3I/KOH yielded the trimethylamine-tris(pentafluoroethyl)borane (C2F5)3B · NMe3 (2). Compound 2 reacts with NEt3×3HF at 200—204 °C under replacement of the trimethylamine ligand to form the novel fluoro-tris(pentafluoroethyl)borate anion [(C2F5)3BF]—
二甲胺-三(五氟乙基)硼烷 (C2F5)3B · NHMe2 (1) 由 C2F5I、Br2BNMe2 和三(二乙氨基)膦在环丁砜中得到。使用 CH3I/KOH 烷基化产生三甲胺-三(五氟乙基)硼烷 (C2F5)3B·NMe3 (2)。化合物 2 与 NEt3×3HF 在 200-204 °C 下取代三甲胺配体反应生成新型氟代三(五氟乙基)硼酸阴离子 [(C2F5)3BF]- (3),收率良好。副产物是羟基-三(五氟乙基)硼酸酯[(C2F5)3BOH]-(4)和氢化-三(五氟乙基)硼酸酯[(C2F5)3BH]-(5)。