Question

a Choose the correct IUPAC name for each carboxylic acid. YOH 2,3-dimethylpentanoic acid 3-ethyl-2-methylpentanoic acid 2-met
COOH pentanoic acid Obutanoic acid valeric acid hexanoic acid propanoic acid caproic acid butyric acid propionic acid
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Answer #1

Find the longest chain which contains carboxylic acid.

Numbering is done from the carboxylic acid group.

a) longest chain has 5 carbon , so parent name pentane.

There is two methyl group at 3 and 4 position.

IUPAC name : 3,4-dimethylpentanoic acid

b) longest chain have 4 carbons, so parent name butane

At position 2 there is a amino group

IUPAC name : 2-aminobutanoic acid

c)

Longest chain has 6 carbons, so parent name hexane

IUPAC name: hexanoic acid

OH => 3, 4- Dimethyspentanoic Acid YENOH NH → 2-aminobutanoic Acid (1) coon » hexanoic Acid

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