Question

Which of the following does not show resonance effect?

• A. 1, 3-Butadiene
• B. Acrylonitrile
• C. Nitrobenzene
• D. Isopropyl isothiocyanate

Answer 1

Answer: (D)

Resonance effect involves delocalisation of $\pi$-electrons of two or more conjugated double bonds or non-bonding electrons and $\pi$-electrons of a double bond.
$\underset{\text{Isopropyl isothiocyanate}}{(C{H}_3{)}_{2}CH-SC\equiv N}$ does not show resonance effect.