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Azido


Azide is the anion with the formula N
3
. It is the conjugate base of hydrazoic acid (HN3). N
3
is a linear anion that is isoelectronic with CO2, NCO, N2O, NO+
2
and NCF. Per valence bond theory, azide can be described by several resonance structures; an important one being . Azide is also a functional group in organic chemistry, RN3. The dominant application of azides is as a propellant in air bags.


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