Which of the following can show resonance?

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

Question

(C) Resonance occurs in conjugated systems where $p$-orbitals are parallel and overlapping,allowing for the delocalization of $\pi$-electrons or lone

Vedclass · Accepted Answer

$CH_3-CH=CH-CHO$

Vedclass · Answer

(C) Resonance occurs in conjugated systems where $p$-orbitals are parallel and overlapping,allowing for the delocalization of $\pi$-electrons or lone pairs.$A$. $CH_2=CH-CH_2-CH=CH_2$: This is an isolated diene. The two double bonds are separated by an $sp^3$ hybridized carbon atom,so they cannot show resonance.$B$. $CH_2=C(CH_3)_2$: This is an alkene with no conjugation.$C$. $CH_3-CH=CH-CHO$: This molecule has a conjugated system $(C=C-C=O)$. The $\pi$-electrons can delocalize between the carbon-carbon double bond and the carbon-oxygen double bond.$D$. $C_6H_9^+$: This is an allylic carbocation where the positive charge is conjugated with the double bond,allowing for resonance stabilization.Both $C$ and $D$ show resonance. However,in many contexts,the question might be looking for the most prominent example or there might be a typo in the options provided. Given the standard options,both $C$ and $D$ are valid. Assuming a single choice is required,$C$ is a classic example of conjugated carbonyl.

Similar Questions

Which of the two structures $A$ $(CH_3COOH)$ and $B$ $(CH_3COO^-)$ given below is more stabilised by resonance? Explain.

$CH_2=CH-CH=CH-NH_3^+$ $(I)$
$^+CH_2-CH=CH-CH=NH_3^+$ $(II)$
$^+CH_2-CH=CH-CH=NH_3$ $(III)$
Which of these structures is not a valid canonical structure?

Comment on the nature of two $S-O$ bonds formed in $SO_{2}$ molecule. Are the two $S-O$ bonds in this molecule equal?

In which of the following,the bond length between carbon and carbon atoms is equal?

Assertion : Energy of resonance hybrid is equal to the average of energies of all canonical forms.
Reason : Resonance hybrid cannot be presented by a single structure.

Vedclass Test Series

Exam Paper Generator

Online Exam Module