11th Class Chemistry The p-Block Elements-I

  • question_answer 71)
      Explain why the following compounds act as Lewis acids? (a) \[BC{{l}_{3}}\]                             (b) \[AlC{{l}_{3}}\]


      \[\mathbf{BC}{{\mathbf{l}}_{\mathbf{3}}}\]is an electron deficient compound as the boron atom acquires six electrons in its outermost shell. It can accept a pair of electrons from a suitable donor to attain an octet configuration. Thus, \[BC{{l}_{3}}\] acts as a Lewis acid. \[AlC{{l}_{3}}\]is also an electron deficient compound and accepts alone pair from a donor and acts as a Lewis acid.

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