Which of the following pairs of structures do | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) Resonating structures must have the same number of atoms and the same arrangement of atoms; they only differ in the position of $\pi$-electrons or

Vedclass · Accepted Answer

$A$

Vedclass · Answer

(A) Resonating structures must have the same number of atoms and the same arrangement of atoms; they only differ in the position of $\pi$-electrons or lone pairs.$(A)$ represents keto-enol tautomerism,where the position of an atom (hydrogen) changes. Thus,they are tautomers,not resonating structures.$(B)$ represents $1,3-$cyclohexadiene and $1,4-$cyclohexadiene. These are isomers with different positions of double bonds,but they are not resonating structures because the carbon skeleton connectivity is effectively different regarding the $\pi$-system.$(C)$ represents two Kekulé structures of benzene,which are valid resonating structures.Since both $(A)$ and $(B)$ do not represent resonating structures,the question implies identifying the pair that is not resonating. However,based on standard chemistry,both $(A)$ and $(B)$ are not resonating structures. Given the options,$(A)$ is a classic example of tautomerism.

Which of the following pairs of structures does not represent resonating structures?

Similar Questions

What will be the resonance energy of $N_2O$ from the following data: $\Delta H_f(N_2O) = 82 \ kJ \ mol^{-1}$. Bond energies of $N \equiv N$,$N = N$,$O = O$,and $N = O$ bonds are $946$,$418$,$498$,and $607 \ kJ \ mol^{-1}$ respectively.

Which of the following molecules shows the least resonance stabilization?

Which of the following statements is not true about resonance?

The acetate ion $(CH_3COO^-)$ contains:

Explain the important aspects of resonance with reference to the $CO_3^{2-}$ ion.

Vedclass Test Series

Exam Paper Generator

Online Exam Module