Fluorine azide or
triazadienyl fluoride FN
3 is a yellow green gas composed of
nitrogen and
fluorine with formula FN
3. It is counted as an interhalogen compound, as the azide functional group is termed a
pseudohalogen. It resembles
ClN3,
BrN3, IN
3 in this respect. The bond between the fluorine atom and the nitrogen is very weak, leading to this substance being very unstable and prone to explosion. Calculations show the F—N angle to be around 102° with a straight line of 3 nitrogen atoms.