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Which of the following is an isomer of ethyl propanoate (C₄H₈O₂)? A - Scottish Highers Chemistry - Question 10 - 2017
Question 10
Which of the following is an isomer of ethyl propanoate (C₄H₈O₂)? A. Methyl propanoate B. Pentan-2-one C. Pentanoic acid D. Pentane-1,2-diol
Worked Solution & Example Answer:Which of the following is an isomer of ethyl propanoate (C₄H₈O₂)? A - Scottish Highers Chemistry - Question 10 - 2017
Step 1
Identify the Structure of Ethyl Propanoate
Answer
Ethyl propanoate has the molecular formula C₄H₈O₂ and consists of an ethyl group attached to a propanoate functional group. The structural representation is:
O
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CH₃-CH₂-C-O-CH₂-CH₃
From this, we can derive that ethyl propanoate is an ester.
Step 2
Evaluate Each Option for Isomerism
Answer
Now, we analyze the options provided:
- A. Methyl propanoate (C₄H₈O₂): This is indeed an isomer of ethyl propanoate; it has the same molecular formula but a different structure.
- B. Pentan-2-one (C₅H₁₀O): This compound has a different molecular formula and is not an isomer.
- C. Pentanoic acid (C₅H₁₀O₂): This also has a different molecular formula and is not an isomer of ethyl propanoate.
- D. Pentane-1,2-diol (C₅H₁₂O₂): This compound has a different molecular formula and is not an isomer.
After analyzing the options, only methyl propanoate qualifies as an isomer.