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What is crum brown gibson rule?how does it help in organic chemistry?

What is crum brown gibson rule?how does it help in organic chemistry?

Grade:12th pass

1 Answers

Ravleen Kaur
askIITians Faculty 1452 Points
2 years ago
The Crum–Brown–Gibson rule states that the substituent already present on the benzene ring is considered to be linked to hydrogen (i.e., the benzene ring can be replaced by a hydrogen atom), and if the corresponding compound can be directly oxidized, then the second incoming group takes up the positionmetato the existing substituent; otherwise, the incoming group would enter the position eitherparaororthoto the existing substituent.

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