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首页> 外文期刊>Acta Crystallographica, Section B. Structural Science >Chemical bonding in energetic materials: beta-NTO
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Chemical bonding in energetic materials: beta-NTO

机译:高能材料中的化学键:β-NTO

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The electron density and related properties of the quasi-stable beta form of 5-nitro-2,4-dihydro-3H-1,2,4-triazol-3-one (NTO; space group P2(1)/c) have been determined from a low-temperature [100 (1) K] X-ray diffraction experiment. Intensities were measured with a 2K CCD Bruker diffractometer using Ag K alpha radiation. Two detector settings, several phi settings, 0.3 degrees omega scans and 160 s exposure time per frame gave R-int = 0.0215 for 68 989 (4080 unique) reflections and (sin theta/lambda )max = 1.23 Angstrom (-1). The Hansen-Coppens [Acta Cryst. (1978), A34, 909-921] multipole model as implemented in the XD program gave R = 0.0333 (all reflections), which allowed calculation of the electron density, Laplacian and electrostatic potential distributions. The bonding (3,-1) critical points and the molecular dipole moment of 3.2 (1) D were also obtained. Chemical bonding in the molecule is discussed. [References: 32]
机译:5-硝基-2,4-二氢-3H-1,2,4-三唑-3-酮(NTO;空间群P2(1)/ c)的准稳定β形式的电子密度和相关性质具有由低温[100(1)K] X射线衍射实验确定。用2K CCD Bruker衍射仪使用Ag Kα辐射测量强度。两种检测器设置,几种phi设置,0.3度Ω扫描和每帧160 s的曝光时间,对于68 989个(独特的4080个)反射,R-int = 0.0215,并且(sin theta / lambda)max = 1.23埃(-1)。 Hansen-Coppens [Acta Cryst。 (1978),A34,909-921]在XD程序中实现的多极模型给出R = 0.0333(所有反射),从而可以计算电子密度,拉普拉斯分布和静电势分布。还获得了键合(3,-1)临界点和3.2(1)D的分子偶极矩。讨论了分子中的化学键。 [参考:32]

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