P-Block Elements Ques 542

Question: Which of the following has the minimum heat of dissociation:

Options:

A) $ {{( CH_3 )}_3}N:\to BF_3 $

B) $ {{(CH_3)}_3}N:\to B{{(CH_3)}_2}F $

C) $ {{(CH_3)}_3}N:\to B{{(CH_3)}_3} $

D) $ {{( CH_3 )}_3}N:\to B( CH_3 )F_2 $

Show Answer

Answer:

Correct Answer: C

Solution:

Due to +I effect of methyl groups the Lewis character of $ B{{(CH_3)}_3} $ decreases and coordination becomes weaker.



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