Which of the following IUPAC names is incorre | vedclass

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(A) Let us analyze each option:$A$. The structure $CH_3-C(=O)-CH(CH_3)_2$ is $3$-methylbutan-$2$-one,not $2$-methylbutan-$3$-one. The numbering should

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$CH_3-C(=O)-CH(CH_3)_2$: $2$-methylbutan-$3$-one

Vedclass · Answer

(A) Let us analyze each option:$A$. The structure $CH_3-C(=O)-CH(CH_3)_2$ is $3$-methylbutan-$2$-one,not $2$-methylbutan-$3$-one. The numbering should start from the end closer to the ketone group.$B$. The structure $CH_3-CH(CH_3)-CH(CH_3)-CH_2-CH_3$ is correctly named $2,3$-dimethylpentane.$C$. The structure $CH_3-C \equiv C-CH(CH_3)_2$ is correctly named $4$-methylpent-$2$-yne.$D$. The structure $CH_3-CH(Cl)-CH(Br)-CH_3$ is named alphabetically as $3$-bromo-$2$-chlorobutane,not $2$-bromo-$3$-chlorobutane. However,in many contexts,option $A$ is the most fundamentally incorrect due to the numbering priority of the functional group.

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 $IUPAC$ names is incorrect?

Similar Questions

The $IUPAC$ name of the given compound is:

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Give the $IUPAC$ name of $(CH_3)_3CCH(CH_3)CH_2CH_3$.

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