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含能材料  2015 

3,4-双(3-硝基呋咱-4-氧基)呋咱合成、晶体结构及热性能

DOI: 10.11943/j.issn.1006-9941.2015.01.004

Keywords: 有机化学 呋咱醚 晶体结构 构象 热行为

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Abstract:

以二氨基呋咱为原料,经氧化、水解、中和和取代反应合成了3, 4-双(3-硝基呋咱-4-氧基)呋咱,并采用红外光谱、核磁共振、元素分析、X射线单晶衍射等进行了结构表征。晶体属于单斜晶系,空间群为P21/c,a=15.256(3)?, b=11.579(3)?, c=14.981(3)?, β=117.624(4)°, Mr=328.14, V=2344.7(9)?3, Z=8, Dc=1.859 g·cm-3, F(000)=1312, μ=0.177 mm-1, S=1.012, R1=0.0433,wR2=0.0987。晶体结构分析结果表明,在不对称单元中存在两种构象不同的分子,分子中含有大量的弱键,能够提高化合物的密度和热稳定性。采用差示扫描量热法和热重分析研究了3, 4-双(3-硝基呋咱-4-氧基)呋咱的热分解过程,在10 ℃·min-1的升温条件下,其熔点为72.9 ℃,在245~346 ℃之间存在明显放热过程

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