Which of the following compounds is NOT named | vedclass

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(C) In option $A$,the structure is $CH_3-CH(OH)-CH(CH_3)_2$. The longest chain has $4$ carbons,and the numbering starts from the end closer to the $-O

Vedclass · Accepted Answer

$CH_3-CH_2-C(=CH_2)-CH_2-CH_3$: $2-$ethylbut$-1-$ene

Vedclass · Answer

(C) In option $A$,the structure is $CH_3-CH(OH)-CH(CH_3)_2$. The longest chain has $4$ carbons,and the numbering starts from the end closer to the $-OH$ group,giving $3-$methylbutan$-2-$ol. This is correct.In option $B$,$CH_3-C \equiv C-CH(CH_3)_2$ is $4-$methylpent$-2-$yne. This is correct.In option $C$,the structure is $CH_3-CH_2-C(=CH_2)-CH_2-CH_3$. The longest chain containing the double bond has $5$ carbons,so it should be $2-$ethylpent$-1-$ene. The name $2-$ethylbut$-1-$ene is incorrect.In option $D$,$3-$methyl$-4-$ethylheptane follows alphabetical order ($e$ before $m$),which is correct.

Which of the following compounds is $NOT$ named according to $IUPAC$ rules?

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