Question

An alkene, \(X\) \((\mathrm{C_5H_{10}})\) exhibits cis/trans isomerism. Bromination of \(X\) followed by reaction with reagent(s) \(Y\) gave the product \(Z\). What are \(Y\) and \(Z\)?

• A. \(\mathrm{NaNH_2}\) ; \((\mathrm{CH_3})_2\mathrm{CHC\equiv CH}\)
• B. \(\mathrm{KOH(aq)}\) ; \(\mathrm{CH_3CH_2CH_2C\equiv CH}\)
• C. alc.\(\mathrm{KOH,\ NaNH_2}\) ; \(\mathrm{CH_3CH_2C\equiv CCH_3}\)
• D. alc.\(\mathrm{KOH,\ NaNH_2}\) ; \(\mathrm{CH_3CH_2CH_2C\equiv CH}\)

Hint:

Vicinal dibromoalkanes on treatment with \[ \boxed{\text{alc. KOH followed by } \mathrm{NaNH_2}} \] undergo double dehydrohalogenation to give alkynes.

Answer 1

The Correct Option is C