氟鏻阳离子的合成与路易斯酸性
Synthesis and Lewis acidity of fluorophosphonium cations.
作者信息
Caputo Christopher B, Winkelhaus Daniel, Dobrovetsky Roman, Hounjet Lindsay J, Stephan Douglas W
机构信息
Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada.
出版信息
Dalton Trans. 2015 Jul 21;44(27):12256-64. doi: 10.1039/c5dt00217f.
A series of fluorophosphonium salts, [R3PF][X] (R = alkyl or aryl; X = FB(C6F5)3, [B(C6F5)4]), have been prepared by reactions of phosphine/borane frustrated Lewis pairs (FLPs) with XeF2 or difluorophosphoranes with [Et3Si][B(C6F5)4]. As the substituents bound to phosphorus become increasingly electron withdrawing, the corresponding fluorophosphonium salts are shown to be increasingly Lewis acidic. Calculations were also performed to determine the relative fluoride ion affinities (FIA) of these fluorophosphonium cations.
通过膦/硼烷受阻路易斯酸碱对（FLPs）与XeF2反应，或二氟膦烷与[Et3Si][B(C6F5)4]反应，制备了一系列氟鏻盐[R3PF][X]（R = 烷基或芳基；X = FB(C6F5)3、[B(C6F5)4]）。随着与磷相连的取代基的吸电子能力增强，相应的氟鏻盐的路易斯酸性也逐渐增强。还进行了计算以确定这些氟鏻阳离子的相对氟离子亲和力（FIA）。
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