Nitrogen difluoride, also known as difluoroamino, is a reactive radical molecule with formula NF2.

[3] The molecule is unusual in that it has an odd number of electrons, yet is stable enough to study experimentally.

[4] The energy needed to break the N–N bond in N2F4 is 20.8 kcal/mol (87 kJ/mol), with an entropy change of 38.6 eu.

The centrifugal distortion constants are τaaaa = −7.75, τbbbb = −0.081, τaabb = 0.30, and τabab = −0.13.

[5] Nitrogen difluoride is formed during the function of a xenon monofluoride excimer laser.