Which of the following represents the correct IUPAC name for the compounds concerned? 

(a) 2,2-Dimethylpentane or 2-Dimethylpentane 

(b) 2,4,7-Trimethyloctane or 2,5,7- Trimethyloctane 

(c) 2-Chloro-4-methylpentane or 4-Chloro-2-methylpentane 

(d) But-3-yn-1-ol or But-4-ol-1-yne

Asked by Abhisek | 1 year ago |  54

1 Answer

Solution :-

(a) The prefix di shows that there are two methyl groups in the chain. Thus, the correct IUPAC name would be 2,2-Dimethylpentane.

(b) The locant number should start from the minimum. Here, 2,4,7 is lower than 2,5,7. Thus, the correct IUPAC name would be 2,4,7-Trimethyloctane.

(c) If the substituents in the chain are in equivalent positions, then the lower number is given to the substituent group in alphabetical order. Thus, the correct IUPAC name would be 2-Chloro-4-methylpentane.

(d) Out of the two functional groups present in the given compound, the alcoholic group is the principal functional group. Thus, the parent chain will have an –ol suffix. Since the alkyne group is in C–3, the IUPAC name would be But–3–yn–1–ol.

Answered by Pragya Singh | 1 year ago

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