Triazene

A triazene is a functional group consisting of an amine directly bonding to an azo group, i.e. with the linkage R2N-N=NR' where R and R' are alkyl or aryl. Also called a diazoamino group because it is related to a diazo group.

A well known example is of a triazene is diphenyl derivative, PhNH-N=NPh (m.p. 100 °C, CAS #136-35-6). It is prepared from phenyldiazonium salts and aniline in the presence of base:
 * PhN2+ +  PhNH2  →  PhNHN=NPh  +  H+