Overview

Crum Brown's rule


'Crum Brown's rule' can also refer to...

 

More Like This

Show all results sharing this subject:

  • Chemistry

GO

Show Summary Details

Quick Reference

A rule that predicts how substituents will enter the benzene ring. If C6H5X is a compound with one substituent in the benzene ring, it will produce the 1,3 (meta) disubstituted derivative if the substance HX can be directly oxidized to HOX. If not, a mixture of 1,2 (ortho) and 1,4 (para) compounds will be formed. The rule was proposed in 1892 by the British chemist Alexander Crum Brown (1838–1922).

Subjects: Chemistry.


Reference entries

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.