Multiple Choice
Which of the following functional groups is present in a compound with the molecular formula that is commonly known as vanillin?
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2. Molecular Representations
Functional Groups
Multiple Choice
Which of the following compounds contains a ketone functional group?
A
Ethylamine ()
B
Acetic acid ()
C
Ethanol ()
D
Acetone ()
Verified step by step guidance1
Recall the definition of a ketone functional group: it consists of a carbonyl group (C=O) bonded to two carbon atoms. The general structure is R-CO-R', where R and R' are carbon-containing groups.
Examine each compound's structure to identify the presence or absence of the ketone functional group:
1. Ethylamine (C\_2H\_7N) contains an amine group (-NH\_2) attached to an ethyl group, so it does not have a ketone.
2. Acetic acid (C\_2H\_4O\_2) contains a carboxylic acid group (-COOH), which includes a carbonyl but is not a ketone because the carbonyl carbon is bonded to an -OH group, not two carbons.
3. Ethanol (C\_2H\_6O) contains an alcohol group (-OH) attached to an ethyl group, so it does not have a ketone.
4. Acetone (C\_3H\_6O) contains a carbonyl group bonded to two methyl groups, fitting the ketone functional group definition.
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