Heres the most explosive ones I know of:
thats supposedly the most explosive compound known. Cubane itself is extremely rare and difficult to make so octanitrocubane is not feasible at all to produce. Its the nitro groups in TNT that give the compound its explosive properties so octanitrocubane, having 8 nitro groups is kinda like TNT on steroids. I retract that. Its like TNT on phencyclidine (PCP).
This compound is a more explosive analogue of RDX.
This compound is another nitramine like RDX and HMX but as you can see it has a dog kennel shaped carbon skeleton which allows 6 nitramino groups to be attached. Since it has more nitramino groups, its even more powerful than HMX.
From what I read, nitroglycerin is actually more powerful than all those compounds above but its practicality is limited by its instability. I don't understand how nitroglycerin could be more powerful than octanitrocubane though. It only has 3 nitro groups and since its a liquid at room temperature, it must be far less dense. Why is it so explosive?
Thats all I know about, I learned all this reading an article on explosives the other day. List any other powerful substances you know of.