Pentazolate coordination polymers self-assembled by in situ generated [Pb₄(OH)₄]⁴⁺ cubic cations trapping cyclo-N₅⁻

Abstract

A series of cyclo-N5−-based lead-containing energetic coordination polymers [Pb(OH)]4(N5)4 (1), [Pb3(N5)3(H2O)9(NO3)]4(N5)8(H2O)5 (2), [Pb(OH)]4(N5)3(NO3)(H2O)3 (3), and [Pb(OH)]4(N5)3(ClO4)(H2O) (4) were synthesized by self-assembly and characterized by single-crystal X-ray diffraction, powder X-ray diffraction,...

Lithium-Promoted Formation of M-2AZTO-Li (M = N2H5+ or NH3OH+ and AZTO = Anion of 1-Hydroxytetrazole-5-hydrazide)-Type “Quaternary” Complexes with Nitrogen-Rich Characteristics: Construction of Novel Insensitive Energetic Materials

“…Energetic complexes are typically produced in the following three forms (Figure A–C): (A) high-energy anion-metal-cation, − (B) high-energy cation-metal-ion-oxygen-rich-anion, − and (C) azole anion-heavy metal-cation-azide anion. − The foregoing three types of complexes exhibit different characteristics in terms of their physicochemical properties, and of these, types A and B tend to form high-energy complexes with a high oxygen content; a majority of such complexes also have a high mechanical sensitivity, facilitating their use as primary explosives, oxidizer combustion promoters, or heat-resistant explosives. Furthermore, C-type complexes are more likely to form nitrogen-rich structures and exhibit favorable thermal stabilities.…”

Hexaamminecobalt(III) Cation as Multiple Hydrogen Bond Donors: Synthesis, Characterization and Energetic Properties of cyclo-Pentazolate and Azide Based Complexes

“…For 60 years, most researchers tried to cleave the C–N bond of aryl pentazoles but failed. Even if the C–N bond was cleaved, the isolation of pentazole or cyclo -N 5 – was not successful. − Until 2017, Lu et al successfully synthesized the cyclo-N 5 – salts, which existed stably at room temperature for the first time, making a breakthrough in the synthetic study of cyclo -N 5 – . , Subsequently, considerable efforts have been made to explore multiligand metal-pentazolate frameworks and different metals based pentazolate complexes and frameworks based on the multifunctional and multiligand model of cyclo -N 5 – anions. − The metal centers of metal-pentazolate compounds that have been synthesized and those structures have been confirmed by single crystal X-ray diffraction including Li + , Na + , K + , Mg 2+ , Mn 2+ , Fe 2+ , Co 2+ , Cu 2+ , Zn 2+ , Ag + , Ba 2+ , and Pb 2+ . To our knowledge, no trivalent metal-based cyclo -N 5 – compounds have been reported.…”