Electrophilic Activation of Lewis Base Complexes of Borane with Trityl Tetrakis(pentafluorophenyl)borate
作者:Timothy S. De Vries、Edwin Vedejs
DOI:10.1021/om070228w
日期:2007.6.1
Borenium ions do not accumulate under the conditions of hydride abstraction from Lewis base borane complexes (L center dot BH3) using trityl cation because subsequent rapid reaction with L center dot BH3 occurs to form B-H-B bonds. The hydride-bridged cations are sufficiently stabilized to resist abstraction of the remaining hydride by excess trityl cation; however, reversible cleavage of the 3c2e bond does take place to release borenium ion equivalents, as evidenced by interaction with weak nucleophiles.