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# Which of the following compounds

Question:

Which of the following compounds does not exhibit resonance?

1. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OCH}=\mathrm{CH}_{2}$

2. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CONH}_{2}$

3. $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}=\mathrm{CHCH}_{2} \mathrm{NH}_{2}$

Correct Option: , 4

Solution:

$\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_{2}-\mathrm{NH}_{2}$

No conjugation thus resonance is not possible.