Question

Given below are two statements: Statement I:
IUPAC name of \(HO–CH_2​–(CH_2​)_5​–CH_2​–COCH_3\)​ is 7-hydroxyheptan-2-one. 
Statement II: 2-oxoheptan-7-ol is the correct IUPAC name for above compound. 
In the light of the above statements, choose the most appropriate answer from the options given below:

• A. Statement I is correct but Statement II is incorrect.
• B. Both Statement I and Statement II are incorrect.
• C. Both Statement I and Statement II are correct.
• D. Statement I is incorrect but Statement II is correct.

Answer 1

The Correct Option is A

To ascertain the accuracy of the provided statements, an analysis of the chemical structure and IUPAC nomenclature conventions is necessary.

1. The compound presented is \(HO–CH_2​–(CH_2​)_5​–CH_2​–COCH_3\). This structure consists of a seven-carbon chain with a hydroxyl group attached to the first carbon and a ketone group to the second carbon. The IUPAC name must reflect these functional groups.
2. IUPAC naming mandates identifying and numbering the longest carbon chain, commencing from the terminus closest to the highest priority functional group. In this instance, the ketone (carbonyl) group supersedes the hydroxyl group in priority.
3. Numbering from the carbonyl end reveals the ketone group at the second carbon (designated as 2-one) and the hydroxyl group at the seventh carbon (designated as 7-ol).
4. Consequently, the accurate IUPAC name is "7-hydroxyheptan-2-one," which aligns with Statement I. Hence, Statement I is correct.
5. Now, let us scrutinize Statement II: "2-oxoheptan-7-ol." This nomenclature implies a ketone at the second carbon (2-oxo) and a hydroxyl group at the seventh carbon (7-ol). However, the format deviates from the established prioritization and standard naming protocols, wherein a hydroxyl suffix (ol) would typically be employed in a different hierarchical context.

Therefore, Statement II is inaccurately formulated according to standard IUPAC naming rules.

Conclusion: The preceding analysis indicates that the option "Statement I is correct but Statement II is incorrect." is the appropriate selection.