2]. The hydridotriphenylborates [(L)M][HBPh3] catalyzed the chemoselective hydroboration of benzophenone by pinacolborane (HBpin), with the lithium derivative being the most active. The solution structure of [(L)Li][HBPh3] was qualitatively investigated in the context of its superior catalytic activity. Fluxional coordination of L in [(L)Li(THF)]+ in tandem with a THF solvent molecule was revealed
三苯基
硼烷(BPH 3)的抽象的β型Si ħ在[(L)M N(SiHMe 2)2 }](L =我6 TREN; M =
锂,
钠,
钾)的THF以得到hydridotriphenylborates [(L )M] [HBPh 3 ]。苯中的反应有利于
硅叠氮化物而不是
氢化物的提取,从而得到[(L)M] [Ph 3 B–N(SiHMe 2)2 ]。氢化三苯
硼酸酯[(L)M] [HBPh 3 ]通过
频哪醇硼烷(HBpin)催化
二苯甲酮的
化学选择性氢
硼化,其中
锂衍
生物活性最高。[(L)Li] [HBPh 3的溶液结构在其优异的催化活性的背景下进行了定性研究。通过NMR光谱揭示了[(L)Li(THF)] +中的L与THF溶剂分子串联的通量配位。对位-取代基在[HB(C 6 H ^ 4 - p -X)3 ] -的影响,其显然通过添加B-H的函数的可分离烷氧基
硼酸中间所确定的速率(L)栗] [PH 2 CHOBPh