Following the 1993 IUPAC recommendations for molecules with more than two identical principal functi — IUPAC and Nomenclature Chemistry Question
Question
Following the 1993 IUPAC recommendations for molecules with more than two identical principal functional groups directly attached to an unbranched chain, the correct IUPAC name of $HOOC-CH_2-CH(COOH)-CH_2-COOH$ is:
Answer: A
💡 Solution & Explanation
When three or more identical chain-terminating functional groups (like $-COOH$) are attached to an unbranched chain, none of their carbons are included in the principal carbon chain. The 3-carbon parent chain is propane, and special suffixes are used: Propane-1,2,3-tricarboxylic acid.
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