Synthesis and characterization of the pentazolate anion cyclo -N 5 ˉ in (N 5 ) 6 (H 3 O) 3 (NH 4 ) 4 Cl
2017; American Association for the Advancement of Science; Volume: 355; Issue: 6323 Linguagem: Inglês
10.1126/science.aah3840
ISSN1095-9203
AutoresChong Zhang, Chengguo Sun, Bingcheng Hu, Chuanming Yu, Ming Lu,
Tópico(s)Crystal structures of chemical compounds
ResumoPentazole (HN5), an unstable molecular ring comprising five nitrogen atoms, has been of great interest to researchers for the better part of a century. We report the synthesis and characterization of the pentazolate anion stabilized in a (N5)6(H3O)3(NH4)4Cl salt. The anion was generated by direct cleavage of the C-N bond in a multisubstituted arylpentazole using m-chloroperbenzoic acid and ferrous bisglycinate. The structure was confirmed by single-crystal x-ray diffraction analysis, which highlighted stabilization of the cyclo-N5- ring by chloride, ammonium, and hydronium. Thermal analysis indicated the stability of the salt below 117°C on the basis of thermogravimetry-measured onset decomposition temperature.
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