Question
Which of the following gives the most stable carbocation by dehydration?
✓
Answer
Easy dehydration of compound depends on the following parameters.Resonance stabilized carbocation formation after dehydration.
$+M$ and $+I$ effect of an adjacent group of atoms.
The number of $\alpha$ hydrogen attached with carbocation.
Compound $B$ is the one that is most readily dehydrated because it forms a tertiary carbocation with nine $\alpha−H$ atoms which makes it the most stable carbocation.
The dehydration reaction is shown as below;
$+M$ and $+I$ effect of an adjacent group of atoms.
The number of $\alpha$ hydrogen attached with carbocation.
Compound $B$ is the one that is most readily dehydrated because it forms a tertiary carbocation with nine $\alpha−H$ atoms which makes it the most stable carbocation.
The dehydration reaction is shown as below;
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