Nitrogen pentafluoride

This was made by treating nitrogen trifluoride and fluorine with 3 MeV electron radiation at 77 K. It decomposed above 143 K back into those ingredients.

[2] Theoretical studies also show the ionic compound is very likely to decompose to nitrogen trifluoride and fluorine gas.

[7] Dominik Kurzydłowski and Patryk Zaleski-Ejgierd predict that a mixture of fluorine and nitrogen trifluoride under pressure between 10 and 33 GPa forms [NF4]+F− with space group R3m.

Over 33 GPa it will form a stable ionic compound with formula ([NF4]+)2[NF6]−F− (bis(tetrafluoroammonium) hexafluoronitrate(V) fluoride) with space group I4/m.

Calculations show that fragmentation to form NF4 and F radicals would have a transition state barrier of around 66–84 kJ/mol (15.8–20.0 kcal/mol) and that this process is thermodynamically favourable (exothermic) by 38 kJ/mol (9 kcal/mol).