Q58 / 180 · KCET 2019 · Chemistry
Resonance effect is not observed in
- A\( \mathrm{CH}_{2}=\mathrm{CH}-\mathrm{Cl} \)
- Correct answerB\( \mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CH}_{2}-\mathrm{NH}_{2} \)
- C\( \mathrm{CH}_{2}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}_{2} \)
- D\( \mathrm{CH}_{2}=\mathrm{CH}-\mathrm{C}=\mathrm{N} \)
Solution
(B)
In \( \mathrm{H}_{2} \mathrm{C}=\mathrm{CH}-\mathrm{CH}_{2}-\mathrm{NH}_{2} \), the lone pair of \( \mathrm{N} \) is not on adjacent carbon with \( \pi \) bond. (Not in conjugatedsystem.)
In \( \mathrm{H}_{2} \mathrm{C}=\mathrm{CH}-\mathrm{CH}_{2}-\mathrm{NH}_{2} \), the lone pair of \( \mathrm{N} \) is not on adjacent carbon with \( \pi \) bond. (Not in conjugatedsystem.)
Hence, the correct answer is option: 'B'.