Discussion Forum : Isomerism
Question -


Which of the following is not isomeric with diethyl ether?

Options:
A .    methyl n-propyl ether
B .   1-Butanol
C .   2-Methyl-2-propanol
D .   Butanone
Answer: Option D
:
D
Ketone cannot be an isomer of ether. No matter how you arrange diethyl ether, you cannot get a ketone compound. 
First one is simple right? Just remove one carbon on one side and add to the other side.

C2H5OC2H5     →    C3H7OCH3
It can also become an alcohol. We need to add one hydrogen to the oxygen and shift it to the end.
C2H5OC2H5     →    CH3CH2CH2OH
For third one, follow similar procedure as above. Just use a 3 carbon chain.

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