Chong Zhang1, Chengguo Sun2, Bingcheng Hu3, Chuanming Yu1, Ming Lu3. 1. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China. 2. School of Chemical Engineering, University of Science and Technology Liaoning, Anshan, Liaoning 114051, China. 3. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China. hubc@njust.edu.cn luming@mail.njust.edu.cn.
Abstract
Pentazole (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.
Pentazole (n class="Gene">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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