Scheme 2.
(a) Monocyclic derivatives of 5-aminotetrazoles (A9: determined by X-ray diffraction and converted into room-temperature values); (b) alkyl-bridged bicyclic 5-aminotetrazoles; (c) other bridged bicyclic 5-aminotetrazoles; (d) bar graph of density and impact sensitivity for AT-based energetic compounds.