Organic Chemistry Basics - Result Question 52

####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:

  1. The IUPAC name of the given compound is 3-hydroxy-4-methylpentanoic acid.

Principal chain While naming the compound, the longest chain that have principal functional group $-COOH$ is choosen and numbered in such a manner that the principal functional group gets the lowest possible number. - $OH$ act as substituent and used as prefix in nomenclature.



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