I guess it would depend on The cost and amount of energy needed to synthesize it.
“I guess it would depend on The cost and amount of energy needed to synthesize it.”
my first thought as well ... pretty much any chemical reaction that produces energy had to have had that same amount of energy as well as byproduct/waste energy input into the ultimate components of that reaction at one or more points of the synthesis chain of said components, even if the energy ultimately came from the sun driving photosynthesis of the plants that end up storing solar energy in the form of coal or petroleum ...
> I guess it would depend on The cost and amount of energy needed to synthesize it.
Yes. Unless they have have developed a cheap and safe chemosynthesis process for this the price would be prohibitively expensive.
Chemists have known for decades that the hypothetical N4, N5, N6 and N8 molecules would release large amounts of energy when decomposing to N2, and would have high density, but a simple and safe synthesis path has always been out of reach.
Also, in order to use a high-energy molecule as a rocket propellant, you generally need a liquid that can function for chamber and nozzle cooling.
In short - Hexanitrogen is a lab curiosity, and is unlikely to have any practical applications in rocketry, explosives, or anything else.