Organic Chemistry Basics - Result Question 136
4. The IUPAC name of the following compound is
(a) 4,4 - dimethyl -3-hydroxybutanoic acid
(2019 Main, 8 April I)
(b) 2-methyl-3-hydroxypentan-5-oic acid
(c) 3-hydroxy-4-methylpentanoic acid
(d) 4-methyl-3-hydroxypentanoic acid
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Answer:
Correct Answer: 4. (a)
Solution:
- The IUPAC name of the given compound is 3-hydroxy-4-methylpentanoic acid.
Main chain While naming the compound, the longest chain that has the principal functional group $-COOH$ is chosen and numbered in such a manner that the principal functional group gets the lowest possible number. - $OH$ acts as substituent and is used as prefix in nomenclature.
BETA
