AbstractA nearly zero oxygen balance of organic compounds is characteristic for explosives and high performance solid rocket propellants. Because of its high oxygen content, the introduction of a trinitromethyl group into suitable organic compounds presents an attractive and simple way to produce new explosives. The reaction of 2‐nitro‐3‐acetoxy‐1‐propene with nitroform is described which yields 1,1,1,3,5,5,5‐heptanitropentane. The properties of this compound are described to assess the usefulness of this explosive in a comparison with known explosives of similar structure using theoretical calculations for the lead block, ballistic mortar and detonation properties. Although a possibility exists to introduce another nitro group in position 3 which would produce a compound with even higher oxygen balance, all attempts so far have not achieved this des