The power of halides of boron to act as Lewis acids decrease in the order\

Question

Professor PC Thomas Classes · Answer

Backbonding is in the order $$ \mathrm{BF}_{3}>\mathrm{BCl}_{3}>\mathrm{BBr}_{3} $$ The order acid strength is\ $\mathrm{BBr}_{3}>\mathrm{BCl}_{3}>\mathrm{BF}_{3}$\