Insertion of Carbenes into Deprotonated nido-Undecaborane B11H13(2-)

摘要

We have examined the insertion of carbenes carrying leaving groups into the [ -B H ] dianion to form the [ -1-CB H ] anion. The best procedure uses CF SiMe and LiCl as the source of CF . It is simple, convenient and scalable and proceeds with 70–90% yield. Density functional calculations have been used to develop a mechanistic proposal that accounts for the different behavior of CF , requiring only one equivalent of base for successful conversion of Na[ -B H ] to [ -1-CB H ] , and CCl and CBr , which require more.