Name the following ketones and aldehydes. When possible, give both a common name and an IUPAC name.
(l)

Verified step by step guidance

Step 1: Identify the functional group in the molecule. The structure contains a ketone group (C=O) attached to a cyclic structure, which is a cyclopentanone.

Step 2: Determine the parent chain. The parent chain is the cyclopentane ring, and the ketone group gives it the suffix '-one' in IUPAC nomenclature.

Step 3: Number the ring to give the substituents the lowest possible numbers. Start numbering from the carbonyl carbon (C=O) as position 1.

Step 4: Identify the substituents. There are two methyl groups attached to the ring at positions 3 and 4. These substituents are named as '3,4-dimethyl'.

Step 5: Combine the substituents and parent chain name. The IUPAC name is '3,4-dimethylcyclopentanone'. The common name can be derived similarly, but common names for substituted cyclopentanones are less frequently used.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Functional Groups

Functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules. In the case of ketones and aldehydes, the carbonyl group (C=O) is the defining feature. Aldehydes have the carbonyl group at the end of the carbon chain, while ketones have it within the chain.

IUPAC Nomenclature

IUPAC nomenclature is a systematic method of naming organic chemical compounds. It provides a set of rules to derive the names based on the structure of the molecule, including the longest carbon chain, the position of functional groups, and the type of compound. For ketones and aldehydes, the suffixes '-one' and '-al' are used, respectively, to indicate their functional groups.

Common Names vs. IUPAC Names

Common names are often simpler and more familiar names used for organic compounds, while IUPAC names follow a standardized naming convention. For example, the common name for acetone is derived from its use as a solvent, while its IUPAC name is propan-2-one. Understanding both naming conventions is essential for accurately identifying and communicating about organic compounds.

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Related Practice

Textbook Question

Name the following ketones and aldehydes. When possible, give both a common name and an IUPAC name.

(k)

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Textbook Question

Predict the major products of the following reactions.

(a)