The correct IUPAC name of H_2C=CH-CH(CH_3)-CH | vedclass

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Question

(A) The given compound is $H_2C=CH-CH(CH_3)-CH_2-C \equiv CH$.The parent chain contains $6$ carbon atoms,so the root word is $hex$.The numbering start

Vedclass · Accepted Answer

$3-$methyl$-1-$hexen$-5-$yne

Vedclass · Answer

(A) The given compound is $H_2C=CH-CH(CH_3)-CH_2-C \equiv CH$.The parent chain contains $6$ carbon atoms,so the root word is $hex$.The numbering starts from the end that gives the lowest locant to the multiple bonds. In this case,the double bond is at position $1$ and the triple bond is at position $5$.According to $IUPAC$ rules,if both double and triple bonds are present,the double bond is given priority for numbering if they are at equivalent positions,but here the double bond at $C-1$ is preferred over the triple bond at $C-5$.There is a methyl group at position $3$.Therefore,the correct $IUPAC$ name is $3-$methyl$-1-$hexen$-5-$yne.

The correct $IUPAC$ name of $H_2C=CH-CH(CH_3)-CH_2-C \equiv CH$ is:

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