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. C2H5−O−C2H5 → C3H7−O−CH3 It can also become an alcohol. We need to add one hydrogen to the oxygen and shift it to the end. C2H5−O−C2H5 → CH3−CH2−CH2−OH For third one, follow similar procedure as above. Just use a 3 carbon chain.
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