Number of carboxylic acids and esters isomers for C4H8O2

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The discussion centers on determining the total number of isomeric carboxylic acids and esters for the molecular formula C4H8O2. Initially, one participant calculated four isomers, including 2-methyl propanoic acid and butanoic acid. After further discussion, additional isomers were identified, including propyl methanoate and isopropyl acetate. Ultimately, the consensus reached was that the total number of isomers is six. This conclusion highlights the complexity of isomer formation in organic chemistry.
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Homework Statement



What is the total number of isomeric carboxylic acids and esters having the molecular formula C4H8O2?

A.6

B.5

C.4

D.3

E.2

Homework Equations

The Attempt at a Solution


My answer was 4. The isomers I got was:

-2-methyl propanoic acid
-butanoic acid
-methyl propanoate
-ethyl ethanoate

Did I miss any?

Cheers!
 
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What about esters based on formic acid?
 
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I see, I missed propyl methanoate. Cheers!
 
There are two isomers based on formic acid.
 
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I see, I forgot isopropyl acetate. So the answer is A. Cheers!
 

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