Why phenyl carbocation is unstable?

Answer 1

In phenyl the positive charge acquired is on a sp2 carbon which is electro negative and thus unstable

You could also argue that it is stable because of the positive charge's resonance and delocalization over the benzene ring, but since the positive charge is only present on one sp2 carbon, it is not stable.

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Answer 2

The phenyl carbocation is unstable because the positive charge is localized on a sp² hybridized carbon atom within the phenyl ring. This arrangement leads to significant electron delocalization, which destabilizes the carbocation due to the loss of aromaticity and the resulting increase in energy.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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