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作 者:吴金婷[1] 张建国[1] 牛晓庆[1] 张同来[1]
机构地区:[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081
出 处:《含能材料》2015年第9期842-847,共6页Chinese Journal of Energetic Materials
基 金:The project of State Key Laboratory of Explosion Science and Technology(ZDKT12-03&YBKT 16-04)
摘 要:用缓慢蒸发溶剂法得到了1-氨基联二脲的单晶,并用X-射线单晶分析测定其结构。基于联二脲和1-氨基联二脲的单晶数据,用DTF-FB3LYP方法-cc-pV TZ基组计算了它们的电荷分布、自然键轨道,和分子静电势,以研究它们的电子结构和性质。Mulliken电荷分布数据显示,联二脲中O原子(-0.3470e)的Mulliken电荷最大,其次是N(2A)和N(2)原子(-0.2371e),1-氨基联二脲中O(1)原子(-0.3700e)的Mulliken电荷最大,其次是O(2)原子(-0.3449e),接着是N(5)原子(-0.2399e)。另外,NBO电荷分布以及分子静电势分布数据显示其与Mulliken电荷分布数据具有相同的趋势。三种计算结果表明:联二脲中的N(2)、N(2A)和O原子,以及1-氨基联二脲中的N(5)、O(1)和O(2)原子为它们最可能的配位位置。The single crystal of 1 -amino-biurea was obtained by slow evaporation method in solvent and its structure was determined using X-ray single crystal diffraction analysis. Based on the single crystal data of biurea and 1 -amino-biurea, their charge distribution, natural bond orbit and molecular electrostatic potential were calculated to study their electronic structures and properties by DTF- B3 LYP method with the cc-pVTZ basis set. Mulliken charge distribution data exhibits that O atoms have the most Mulliken charge of -0. 3470e, followed by N (2A) and N (2) atoms ( -0. 2371 e) in biurea, and O(1) atom (-0.3700e) has the most Mulliken charge, secondly 0(2) atom (-0.3449e) and thirdly N(5) atom (-0.2399e) in 1 -amino-biurea. Furthermore, the datas of NBO charge distribution and the molecular electrostatic potential show the same trend with that of Mullik- en charge distribution. All the calculated results show that theO, N(2) andN(2A) atoms ofbiureaandO(1), 0(2) andN(5) atoms ofl-amino- biurea are the most probable coordination site.
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