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Ionisable and Non-Ionisable Compounds

Is phenyl car...

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Is phenyl carbanion and carbocation stable? Are they both aromatic? Are they more or less stable than benzyl carbocation and carbanion?

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Q. The false statements among the following are:
I. A primary carbocation is less stable than a tertiary carbocation.
II. A cyclopropyl methyl carbocation is less stable than allyl carbocation.
III. A tertiary free radical is more stable than a primary free radical.
IV. Isopropyl carbanion is more stable than ethyl carbanion.

p

-methyl benzyl carbocation (I) is more stable than benzyl carbocation (II). Reason: Heterovalent or no bond resonance.

Q. How many carbocations given below are less stable than sec. butyl carbocation ?
T-butyl carbocation, Benzyl carbocation, Allyl carbocation, Cyclopropenyl cation, Tropylium cation, n-butyl carbocation, n-Propyl carbocation, cyclopropylmethyl carbocation.

Q. Out of the following carbocations, how many are more stable than the benzyl carbocation?

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