A nitramine is the compound formed by the substitution of a nitro group for an amine hydrogen. Substitution by an acyl group is also possible, the compound is then the corresponding nitramide. A less extensive series of compounds exists in which substitution by aryl groups has been effected. The nitramines form a limited, but interesting group of organic compounds. The chemistry of these compounds has not been extensively investigated, but their interest as explosives has led to much research regarding possible methods of synthesis.