The following molecules were named incorrectly according to IUPAC nomenclature. Give the correct name of these compounds.
(a) 3-oxo-5-methylhexan-2-ol

검증된 단계별 안내

Step 1: Identify the longest carbon chain in the molecule. The longest chain will determine the base name of the compound. In this case, the longest chain is hexane, which consists of six carbon atoms.

Step 2: Determine the correct numbering of the carbon atoms in the chain. Number the chain from the end nearest to the highest priority functional group. Here, the hydroxyl group (-OH) has higher priority than the ketone group (oxo), so start numbering from the end closest to the hydroxyl group.

Step 3: Identify and name the substituents and functional groups. The molecule has a hydroxyl group (-OH) and a ketone group (oxo). The hydroxyl group is on the second carbon, and the ketone group is on the third carbon. Additionally, there is a methyl group on the fifth carbon.

Step 4: Assemble the name by placing the substituents and functional groups in alphabetical order, followed by the base name of the longest chain. The correct name should reflect the priority of the functional groups and the correct numbering of the chain.

Step 5: Ensure the name follows IUPAC rules, which prioritize the hydroxyl group over the ketone group. The correct name should be structured as: 2-hydroxy-5-methylhexan-3-one.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

IUPAC Nomenclature

IUPAC nomenclature is a systematic method of naming organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry. It provides a standardized way to name molecules so that chemists can easily communicate and understand the structure of a compound. The rules involve identifying the longest carbon chain, numbering the chain to give substituents the lowest possible numbers, and naming substituents and functional groups according to priority.

Functional Group Priority

In IUPAC nomenclature, functional groups are assigned a priority order which affects the numbering of the carbon chain and the suffix used in the compound's name. The group with the highest priority is given the lowest possible number and often dictates the suffix of the compound's name. For example, ketones have a higher priority than alcohols, so in a molecule containing both, the ketone group will influence the main chain numbering and suffix.

Locants in Nomenclature

Locants are numbers used in chemical nomenclature to indicate the position of substituents, functional groups, or double/triple bonds on the main carbon chain. Correctly assigning locants is crucial for accurately naming a compound, as it ensures that the structure is unambiguously described. The goal is to assign the lowest possible numbers to the highest priority groups or substituents, following the IUPAC rules.

The following molecules were named incorrectly according to IUPAC nomenclature. Give the correct name of these compounds.(a) 3-oxo-5-methylhexan-2-ol