Which of the following names is incorrect?

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(D) Let us analyze each structure and its common name:$(A)$ The structure shown is $CH_3-CH(CH_3)-CH_2-CH_3$,which is $2$-methylbutane. Its common nam

Vedclass · Accepted Answer

The structure of $3$-methylpentane is labeled as Isohexane.

Vedclass · Answer

(D) Let us analyze each structure and its common name:$(A)$ The structure shown is $CH_3-CH(CH_3)-CH_2-CH_3$,which is $2$-methylbutane. Its common name is Isopentane. This is correct.$(B)$ The structure shown is $CH_3-C(CH_3)_2-CH_2-CH_3$,which is $2,2$-dimethylbutane. Its common name is Neohexane. This is correct.$(C)$ The structure shown is $CH_3-C(CH_3)_2-CH_2-CH(CH_3)-CH_3$,which is $2,2,4$-trimethylpentane. Its common name is Isooctane. This is correct.$(D)$ The structure shown is $CH_3-CH_2-CH(CH_3)-CH_2-CH_3$,which is $3$-methylpentane. The common name Isohexane refers to $2$-methylpentane $(CH_3-CH(CH_3)-CH_2-CH_2-CH_3)$. Therefore,the label Isohexane for $3$-methylpentane is incorrect.

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