High-energy-density materials: Synthesis and characterization of N 5+[P(N3)6]-, N5+[B(N3)4]-, N5+[HF2]-·n HF, N5+[BF4]-, N5+[PF6]-, and N5+[SO3F]-

Abstract

23 nitrogens and only one phosphorus: The N5+ ion is combined with energetic anions in the form of N5+[P(N 3)6]- and N5+[B(N 3)4]- (see scheme), containing 91 and 96 wt%, respectively, of nitrogen. Also, the thermally unstable compound N 5HF2·n HF is prepared by metathesis from N 5SbF6 and CsHF2. Its usefulness as a reagent for the synthesis of new N5+ salts is demonstrated with the preparation of N5PF6, N5BF4, and N5SO3F.