Chemical Bonding And Molecular Structure Question 458

Question: The formation of molecular complex $ BF_3-NH_3 $ results in a change in hybridization of boron

Options:

A) from $ sp^{2} $ to $ dsp^{2} $

B) from $ sp^{2} $ to $ sp^{3} $

C) from $ sp^{3} $ to $ sp^{2} $

D) from $ sp^{3} $ to $ sp^{3}d $

Show Answer

Answer:

Correct Answer: B

Solution:

  • In $ BF_3 $ , B is $ sp^{2} $ hybridized with one empty $ p_{z} $ orbital. The empty $ p_{z} $ orbital of $ BF_3 $ can be filled by lone pair of molecules such as $ NH_3 $ . When this occurs a tetrahedral molecule or ion is formed which is $ sp^{3} $ hybridized.


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