Coupling reactions of
diazonium ions
In the substitution
reactions above, the nitrogen in the diazonium ion is lost. In the rest of the
reactions on this page, the nitrogen is retained and used to make a bridge
between two benzene rings.
The reaction with phenol
Phenol is dissolved in
sodium hydroxide solution to give a solution of sodium phenoxide.
The solution is cooled
in ice, and cold benzenediazonium chloride solution is added. There is a reaction
between the diazonium ion and the phenoxide ion and a yellow-orange solution or
precipitate is formed.
The product is one of
the simplest of what are known as azo compounds, in which two
benzene rings are linked by a nitrogen bridge.
No comments:
Post a Comment