What is the IUPAC name of a seven carbon linear carboxylic acid?

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What is the  IUPAC name of a seven carbon linear carboxylic acid?

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Question: What is the IUPAC name of a seven carbon linear carboxylic acid?

Since there are no given answer choices to evaluate, we’ll reason from first principles about how IUPAC naming works for straight-chain carboxylic acids.

In IUPAC nomenclature, a carboxylic acid is named as an oxo derivative of the corresponding alkane, but with the suffix -ane replaced by -anoic acid. The root name is based on the number of carbon atoms in the main (longest) carbon chain.

For a linear (unbranched) seven-carbon chain, the parent alkane is heptane. Replacing the final -e with -oic acid yields the systematic name heptanoic acid.

Common names, such as enanthic acid, exist for some carboxylic acids, but IUPAC prefers heptanoic acid in formal naming.

Potential misconceptions to watch out for:
- Confusing with seven-carbon alcohols or aldehydes would lead to different suffixes (e.g., -ol for alcohols, -al for aldehydes).
- Thinking the suffix should be -ic or -ous without the -acid would be incorrect for carboxylic acids.
- Assuming branched variants are involved; a linear seven-carbon chain has no substituents, so there are no locants or substituent names to assign.

In summary, for a straight seven-carbon carboxylic acid, the IUPAC name is derived from the seven-carbon parent and the -anoic acid suffix, giving heptanoic acid as the correct systematic name.

CHE 008B A01 SS1 2025 Lecture 12 - Properties and Nomenclature of Carboxylic Acid Derivatives

What is the IUPAC name of a seven carbon linear carboxylic acid?

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