question_answer 15)

Classify the following species into Lewis acids and Lewis bases and show how these act as Lewis acid/base? (a) \[O{{H}^{-}}\] (b) \[{{F}^{-}}\] (c) \[{{H}^{+}}\] (d) \[BC{{l}_{3}}\]  

Answer:

(a) \[O{{H}^{-}}\] is Lewis base because it acts as electron pair donor. (b) \[{{F}^{-}}\]is also Lewis base. (c) \[{{H}^{+}}\] is Lewis acid because it acts as electron pair acceptor. (d) \[BC{{l}_{3}}\] is electron deficient compound, it acts as electron pair acceptor, i.e., Lewis acid.