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  4. IUPAC name of the following is CH 2= CH - CH 2- CH 2- C ≡ CH

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Q. IUPAC name of the following is
$CH _{2}= CH - CH _{2}- CH _{2}- C \equiv CH$

AIPMTAIPMT 2002Organic Chemistry – Some Basic Principles and Techniques

Solution:

The double bond gets priority over triple bond.
So, the IUPAC name of
$\underset{\text{hex-l-en-5-yne or l-hexene-5-yne}}{\overset{1}{CH _{2}}= \overset{2}{CH} - \overset{3}{CH _{2}}- \overset{4}{CH _{2}}}- \overset{5}{C} \equiv \overset{6}{C}H$ is