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Hello, Q.1. Why Benzene ring is said to be Activated when -OH Group is attached (Phenol) and Deactivated when -Cl Group is attached (Chloro Benzene), even when both the groups are having lone pair ? Q.2. Why anti-markovnikov''s rule is applicable only with Bromine and not with other Halogens ?

Hello,

Q.1. Why Benzene ring is said to be Activated when -OH Group is attached (Phenol) and Deactivated when -Cl Group is attached (Chloro Benzene), even when both the groups are having lone pair ?

Q.2. Why anti-markovnikov''s rule is applicable only with Bromine and not with other Halogens ?

Grade:12th Pass

1 Answers

TANAYRAJ SINGH CHOUHAN
65 Points
10 years ago

Ans.1 Because -OH group shows +R effect by donating its electron but -Cl shows its -I effect which dominates over its +R effect.

 

Ans.2 Anti Marconikov''s Rule is applicable when cyclic transfer of electrons takes place in presence of H2O2.

    It is not only with Br.

 

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