question_answer

Boron halides behave as Lewis base, because of their:

A)  ionic nature

B)  acidic nature

C)   covalent nature

D)  electron deficient nature

Correct Answer: D

Solution :

                 \[{{B}_{G.S.}}1{{s}^{2}},2{{s}^{2}},2{{p}^{1}}\] It means B has three electrons in valence shell and shares three electrons with halogens that makes total of six electrons. Hence, they are electron deficient compounds.