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Three new compounds based on 4,4′-azo-1,2,4-triazol-5-one: Synthesis, crystal structure and thermal properties

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Three new compounds based on 4,4′-azo-1,2,4-triazol-5-one: Synthesis, crystal structure and thermal properties

Content Provider	Springer Nature Link
Author	Miao, Kanghua Guo, Jiajia Song, Jirong Cao, Wenli Huang, Jie
Copyright Year	2016
Abstract	A series of guanidine salts of 4,4′-azo-1,2,4-triazol-5-one with guanidine(1), aminoguanidine(2), diaminoguanidine(3) and triaminoguanidine(4) was prepared. Compounds 2―4 were characterized by infrared(IR) spectroscopy, elemental analysis and single-crystal X-ray diffraction. Thermal decomposition processes of compounds 1―4 were investigated by differential scanning calorimetry(DSC), and all the compounds showed good thermal stability up to 190 °C. Moreover, these four guanidine salts are more unstable with the increasing number of amino groups. Thermal stability parameters(T $_{e, 0}$ and T $_{b}$) and thermodynamic functions(ΔS $^{≠}$, ΔH $^{≠}$ and ΔG $^{≠}$) for compounds 1―4 were calculated. The constant-volume combustion heats(Δ$_{c}$ U) for compounds 2―4 were determined and tended to increase with the increase of the number of amino groups. The calculated standard molar enthalpy of formation(Δ$_{f}$ H m 0 ) of compounds 2―4 are–541.04,–178.67 and–83.08 kJ/mol, respectively. The impact sensitivities results indicate these four energetic salts are less sensitive than 1,3,5-trinitrotriazacyccohexane(RDX) and 1,3,5,7-tetranitrotetraqza-cyclo-octane(HMX).
Starting Page	812
Ending Page	817
Page Count	6
File Format	PDF
ISSN	10059040
Journal	Chemical Research in Chinese Universities
Volume Number	32
Issue Number	5
e-ISSN	22103171
Language	English
Publisher	Jilin University and The Editorial Department of Chemical Research in Chinese Universities
Publisher Date	2016-09-17
Publisher Place	Changchun
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Thermal property Chemistry/Food Science Analytical Chemistry Physical Chemistry High-nitrogen energetic compound X-Ray diffraction Inorganic Chemistry 4,4′-Azo-1,2,4-triazol-5-one Organic Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Education

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