Question

Which of the following statement would be INCORRECT about this compound ?

A. All three C-N bond are of same length
B. `C_1 -N and C_3-N` bonds are of same length but shorter than `C_5-N` bond
C. `C_1 -N and C_5-N` bonds are of same length but longer than `C_3-N` bond
D. `C_1 -N and C_5-N` bonds are of same length but both longer than `C_3-N` bond

Answer 1

Correct Answer - A,B,D
Due to steric hinderance of three groups `-NO_2` group go out of the plane with benzene ring and so conjugation of `-NO_2` group with benzene is slightly diminished.So bond length of `C_1-N` & `C_5-N` is more than `C_3-N`