Triazene
Triazene, also known as triazanylene, is an unsaturated inorganic compound having the chemical formula N3H3. It has one double bond, and is the second-simplest member of the azene class of hydronitrogen compounds, and is not found in nature. It is also the name given to the functional group consisting of an amine directly bonding to an azo group, i.e. with the linkage RRN-N=NR where R, R and R are substituents. The functional group is also called a diazoamino group (but only one of the two substituents R and R may be hydrogen) because it is related to a diazo group.