Question

IUPAC name of $CH\equiv C-CH=C{H}_2$ is

• A. But $-3-$ ene $-1-$ yne
• B. But $-1-$ ene $-3-$ yne
• C. But $-1-$ yne $-3-$ ene
• D. But $-3-$ yne $-1-$ ene

Answer 1

Answer: (B)

$\underset{4}{\mathrm{CH}}\equiv \underset{3}{C-}\underset{2}{C=}\underset{1}{C}$