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Question

The IUPAC Name for the compound

CH3−CH=CH−CH2−C||O−CH2−COOH is


A

5-Oxohex-2-en-1-carboxylicacid

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B

5-Oxo-2-heptenoic acid

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C

3-Oxo-5-heptenoic acid

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D

B-Oxo-8-heptenoic acid

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Solution

The correct option is C

3-Oxo-5-heptenoic acid


There is one double bond and two functional groups:a carboxylic acid group and a ketone group. We need to select the longest carbon chain containing as many of the above their as possible starting from the carboxylic acid.The order of preference is


Hence the numbering is as follows:



word root = hept

primary suffix = ene

secondary suffix = oic acid

secondary prefix=3-oxo

Ans (c) 3- Oxo - 5 - heptenoic acid

(or)

3 - Oxohept - 5 - en - 1 - oicacid


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