Identify the functional group(s) contained in the following compound:

Question

BlackTom AI · Accepted Answer

An amide contains a carbonyl (C=O) directly bonded to a nitrogen atom, so the structure is best recognized by locating a C=O group and checking what is attached to the carbonyl carbon.

Relevant knowledge points and concepts:
- Carbonyl functional group: a carbon double-bonded to oxygen (C=O) is the carbonyl group and is present in several families (aldehydes, ketones, carboxylic acids, esters, amides, etc.).
- Amide functional group: a carbonyl carbon directly bonded to a nitrogen (–C(=O)–N–). If the nitrogen bears one H and one alkyl, it is a secondary amide (–CONHR).
- Ketones/esters/amines differ by what is bonded to the carbonyl carbon or whether a carbonyl exists at all.

Step-by-step reasoning:
1. Inspect the drawn fragment: there is a carbon double-bonded to oxygen (C=O) — this immediately indicates the presence of a carbonyl functional group.
2. Determine the substituents on the carbonyl carbon: one bond goes to a methyl-like carbon (left side), the other bond goes to a nitrogen atom (shown bonded to an H and an ethyl group).
3. Because the carbonyl carbon is bonded to nitrogen, not oxygen or two carbons, the specific carbonyl-containing functional group is an amide (–C(=O)–N–). The nitrogen bears one H and one ethyl substituent, so this is a secondary amide (CONHR).
4. Therefore the molecule contains both the general carbonyl functional group and the specific amide functional group.

Why the correct answers are correct:
- Amide: correct because the carbonyl carbon is directly bonded to a nitrogen atom (–C(=O)–N–).
- Carbonyl: correct because the molecule contains a C=O group.

Why the other options are incorrect:
- Ketone: incorrect because a ketone has the carbonyl bonded to two carbon atoms (R–C(=O)–R); here one substituent is nitrogen, not carbon.
- Ester: incorrect because an ester has the carbonyl bonded to an oxygen atom (R–C(=O)–O–R); here the heteroatom attached is N, not O.
- Amine: incorrect as a primary classification because an amine is a nitrogen bonded to carbons/hydrogens without a directly attached carbonyl; here the nitrogen is part of an amide (it is bonded to a carbonyl), so it is not classified separately as a simple amine.

Conclusion: The correct functional groups are Amide and Carbonyl, which matches the provided answer.

Identify the functional group(s) contained in the following compound:多项选择题

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