Which is more stable allylic carbocation or Benzylic carbocation?

Generally, the benzylic carbocations are more stable than allylic carbocations as they form more number of resonating structures and have less electron affinity.

What is a benzylic carbocation?

Benzyl carbocation: The carbocation derived by removing a hydride ion from the methyl group of toluene. Any carbocation in which the positive formal charge and open octet are situated adjacent to a benzene ring is called a benzylic carbocation.

Why benzylic and allylic carbanion is more stable?

The carbanions are unstable due to a negative charge on carbon and any factor which increases this negative charge makes them more unstable. However, allyl and benzyl carbanions are as usual more stable due to resonance.

What is allylic and benzylic alcohol?

structure and classification of alcohols In alcohol: Structure and classification of alcohols. Alcohols are referred to as allylic or benzylic if the hydroxyl group is bonded to an allylic carbon atom (adjacent to a C=C double bond) or a benzylic carbon atom (next to a benzene ring), respectively.

Why is allylic carbocation more stable?

Allylic carbocations are a common conjugated system. The positive charge of a carbocation is contained in a P orbital of a sp2 hybrizied carbon. This allows for overlap with double bonds. This delocalization stablizes the allyl carbocation making it more stable than a normal primary carbocation.

Why is allylic carbocation more stable than tertiary carbocation?

Allylic Carbocation is more stable due to Greater mesomeric effect where as on the other side tertiary butyl Carbocation is stabilized by triple inductive effect. In both the cases mesomeric effect dominates the inductive effect due to actual delocalisation of pi electrons.

What is the difference between carbocation and Carbanion?

Carbocation and carbanion are two terms that are frequently used in organic chemistry. The main difference between carbocation and carbanion is that carbocation contains a carbon atom bearing a positive charge whereas carbanion contains a carbon atom bearing a negative charge.

Why benzylic carbocation is more stable?

The stability of the carbocations increases from primary carbocation to tertiary carbocation as the methyl group increases. But out of all these carbocation the benzyl carbocation is considered to be most stable because of the delocalization of charge over the ring due to resonance of $$\pi electrons$$.