JEE Main Chemistry question

Give the IUPAC name of the compound:

HOOC–CH₂–CH(COOH)–CH₂–CH₂–COOH

(A)2-(carboxymethyl)-pentane-1,5-dioic acid
(B)3-carboxyhexane-1,6-dioic acid
(C)Butane-1,2,4-tricarboxylic acidCorrect
(D)4-carboxyhexane-l,6-dioic acid

Answer: (C)

Solution

When a molecule has more than one –COOH group, IUPAC rules require selecting the principal chain that bears the **maximum number of the principal characteristic group (–COOH) expressible as a suffix**, even if a longer chain is available — chain length is a lower-priority criterion than maximizing suffix groups. Here

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Question ID VK-138952