多叠氮基三唑类高氮化合物的合成与晶体结构

2,5,2'-三氯-1,1'-偶氮-1,3,4-三唑(1)与叠氮化钠反应首次合成含有多叠氮和四氮烯(N—N＝N—N)结构的高氮化合物2,5,2'-三叠氮-1,1'-偶氮-1,3,4-三唑(3). 在相同条件, 2,5,2',5'-四氯-1,1'-偶氮-1,3,4-三唑(2)与叠氮化钠反应没有得到2,5,2',5'-四叠氮-1,1'-偶氮-1,3,4-三唑(b), 而是得到其分解产物3,5-二叠氮基-1,2,4-三唑(4). 用X 射线单晶衍射测定了化合物3和4的晶体结构. 晶体2b通过分子间氢键的相互作用形成具有9元环的三聚体，并由于三唑环共轭体系使氮上的H原子具有酸性，从而导致互变现象发生.

Synthesis and Crystal Structure of Novel Highly Nitrogen-Containing Compound of Polyazidotriazole

2,5,2'-trichloro-1,1'-azo-1,3,4-triazole (1) was treated with sodium azide to afford a novel high nitrogen compound of polyazidotriazole involving a tetrazene (N—N＝N—N) structure: 2,5,2'-triazido-1,1'- azo-1,3,4-triazole (3). Under the same condition, 2,5,2',5'-tetraazido-1,1′-azo-1,3,4-triazole (b) was not accomplished, whereas its decomposed product 3,5-diazido-1,2,4- triazole (4) has been obtained in an acceptable yield. The crystal structures of 3 and 4 have been determined by X-ray diffraction analysis. The crystal measurement of 4 showed that the annular tautomerism phenomenon was due to the NH acidity and the intermolecular hydrogen bonds leading to a trimer with a 9-membered cycle.