直链取代五唑共价化合物的稳定性和热解机理理论研究

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五唑离子化合物是当前新型含能材料的一个研究热点,其制备通常以五唑共价化合物为前体实现。多数情况下,五唑共价化合物的稳定性对能否成功制备五唑离子化合物有很大影响。采用密度泛函理论B3LYP/6-31G**方法重点研究了18个直链取代五唑共价化合物(R—N5或N5—R—N5)的侧链化学键的解离能EBD和N5环的分解能垒Ea,分析了侧链对其稳定性和热解机理的影响。发现当R为羟基或氨基时,侧链容易断裂,N5环也容易破裂,难以得到N5-;当R为烷基时,N5环裂解的Ea相对较大,更可能得到N5-,且侧链C—N键和N5
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