Benzenediazonium
fluoroborate is water insoluble and stable at room temperature The reactions of diazonium salts can be broadly divided into two
categories, namely (A) reactions involving displacement of nitrogen and
(B) reactions involving retention of diazo group A Reactions involving displacement of nitrogen
Diazonium group being a very good leaving group, is substituted
by other groups such as Cl
–, Br
–
, I
–
, CN
–
 and OH
– which displace
nitrogen from the aromatic ring