Substitution in the context of organic chemistry has the general meaning of replacing an atom, a functional group, or a substituent in a molecule.
Substituted compounds are chemical compounds where one or more hydrogen atoms of a core structure have been replaced with a functional group like alkyl, hydroxy, or halogen.
Benzene is a simple aromatic ring. Substituted benzenes are a heterogeneous group of chemicals with a wide spectrum of uses and properties:
A substitution reaction is a general type of organic reaction where one functional group or substituent in the reactant molecule is replaced by another. Common types of substitution reactions are:
it:Reazione di sostituzione