Illustrated Glossary of Organic Chemistry

Ortho: The relationship between two benzene ring substituents on adjacent benzene ring carbons.


The relationship of two benzene ring substituents can be described as ortho, meta, or para.

  
  
Ortho-dibromobenzene
o
-dibromobenzene
1,2-dibromobenzene

Meta-nitrotoluene
m-nitrotoluene
3-nitrotoluene

Para-xylene
p-xylene
1,4-dimethylbenzene