Question

To synthesize the unsymmetrical alkyne

the reagents needed would be

• A. Ethane, iodoethane, iodomethane and potassium hydroxide
• B. Acetaldehyde, 1-bromopropane and conc. H₂SO₄
• C. 1, 2-dicholoethane, 1-propanol and alcoholic potassium hydroxide
• D. Ethyne, iodomethane, iodoethane and sodamide

Answer 1

The correct option is D

Ethyne, iodomethane, iodoethane and sodamide

$CH\equiv CH\stackrel{NaN{H}_2}{\to }CH\equiv C^{-}N{a}^{+}\underset{-Nal}{\overset{C{H}_{3}l}{\to }}CH\equiv C-C{H}_3$

$C_2{H}_5-C\equiv C-C{H}_3\underset{-Nal}{\overset{C_2{H}_{5}l}{\leftarrow }}N{a}^{+}{C}^{-}\equiv C-C{H}_3$
$Pent-2-yne$