The structure of an organic substance is shown - HSC - SSCE Chemistry - Question 12 - 2024 - Paper 1
Question 12
The structure of an organic substance is shown.
What is the preferred IUPAC name for this substance?
A. 2-chloro-1-ethylbutanamide.
B. 2-chloro-N-ethylpropanamide.
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Worked Solution & Example Answer:The structure of an organic substance is shown - HSC - SSCE Chemistry - Question 12 - 2024 - Paper 1
Step 1
Identify the main chain and substituents
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Answer
The main chain consists of a butanamide backbone due to the presence of the amide functional group. The chlorine (Cl) atom and the ethyl group (C2H5) are identified as substituents.
Step 2
Determine the position of the substituents
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Answer
The chlorine substituent is located at the third carbon (C3) of the butanamide chain, while the ethyl group is attached to the second carbon (C2) in the amide.
Step 3
Construct the IUPAC name
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Answer
Based on the aforementioned details, the correct IUPAC name is '3-chloro-N-ethylpropanamide'.
