Which of the following compounds is NOT named | vedclass

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Question

(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.

List-$I$ (structure)	List-$II$ ($IUPAC$ Name)
$A$. $CH_3CH_2CH(CH_2CH_3)CH_2CH(CH_3)CH_2CH_3$	$I$. $4-$Methylpent$-1-$ene
$B$. $(CH_3)_2C(C_3H_7)_2$	$II$. $3-$Ethyl$-5-$methylheptane
$C$. $CH_2=C(CH_3)CH=CHCH_3$	$III$. $4,4-$Dimethylheptane
$D$. $CH_2=CHCH_2CH(CH_3)CH_3$	$IV$. $2-$Methyl$-1,3-$pentadiene

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

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