Aryl-diazonium derivatives (ADD) are a class
of highly useful reaction intermediates, or reagents. Their salts are generally
obtained from the diazotization of aromatic amines in the presence of
tetrafluoroboric acid, hexafluorophosphate or hexafluoroantimonate.
Aryl-diazonium
salts are widely used in organic chemistry as reactants for different syntheses.
For instance, the process of nitrogen elimination from diazonium cations is a
fundamental stage of the Meerwein and Sandmeyer reactions.
The rise in popularity of aryl-diazonium salts
has further resulted from their efficiency in surface functionalization, where
covalently attached coatings on (semi)-conducting materials bear a wide range
of functional groups.
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