Energetic <i>C</i>-trinitromethyl-substituted pyrazoles: synthesis and characterization
作者:Yiying Zhang、Yanan Li、Jianjian Hu、Zhongxue Ge、Chenghui Sun、Siping Pang
DOI:10.1039/c8dt04712j
日期:——
A new family of C-trinitromethyl-substituted pyrazoles was designed and obtained in good yields by the reaction of N2O4 with the pyrazolecarbaldehyde oxime followed by further N-nitration and C-nitration. All of the new compounds were fully characterized by IR and NMR spectroscopy, elemental analysis and differential scanning calorimetry (DSC). Compounds 2 and 3 were further confirmed by X-ray crystallography
设计了新的C-三硝基甲基取代的吡唑家族,并通过N 2 O 4与吡唑甲醛反应,进一步进行N-硝化和C-硝化反应以高收率获得。所有新化合物均通过IR和NMR光谱,元素分析和差示扫描量热法(DSC)进行了全面表征。化合物2和3通过X射线晶体学进一步证实。这些吡唑衍生物具有良好的密度,正的形成焓和可接受的敏感性值。使用高斯03和EXPLO5程序进行的理论计算证明,在ADN和HMX范围内,爆轰速度和爆轰压力非常好。化合物3表现出正氧平衡,高比冲和中度热稳定性是有希望的高能量密度的氧化剂。
3-三硝基甲基吡唑化合物
申请人:西安近代化学研究所
公开号:CN109251174B
公开(公告)日:2020-06-23
本发明公开了一种3‑三硝基甲基吡唑化合物,其结构式如(I)所示:本发明主要用于含能材料领域。
Effects of solvatomorphism, the nature of a chelating ligand synthon and a counterion on the single crystal XRD structure and SMM properties of paramagnetic monocapped cobalt(<scp>ii</scp>) tris-pyrazoloximates
作者:Svetlana A. Belova、Alexander S. Belov、Anastasia A. Danshina、Yan V. Zubavichus、Dmitriy Yu. Aleshin、Alexander A. Pavlov、Nikolay N. Efimov、Yan Z. Voloshin
DOI:10.1039/d3dt03025c
日期:——
A series of monocapped cobalt(II) tris-pyrazoloximates was obtained through the template condensation of the corresponding pyrazoloxime, phenylboronic acid and a suitable cobalt(II) halogenide. Comparing 3-acetylpyrazoloxime versus its methine-containing homolog, the former produced cobalt(II) clathrochelates in substantially higher yields due to the electron donating effect of the methyl substituent
通过相应的吡唑肟、苯基硼酸和合适的卤化钴( II )的模板缩合得到一系列单封端的三吡唑肟钴( II )盐。比较3-乙酰基吡唑肟与其含次甲基同系物,由于甲基取代基的给电子效应,增加了其肟基团的N-供体能力,前者以显着更高的产率产生了钴( II )笼形螯合物。它们与电子受体三氟甲基的较少N-供体类似物没有形成这种类型的钴( II )络合物。在所有无溶剂和含溶剂晶体中,封装的钴 ( II ) 离子采用高自旋态,根据 Co-N 键长 2.112(4)–2.188(9) Å 进行测量,并且位于几乎位于其CoN 6配位多面体的中心。他们的 CoN 6多面体具有几乎理想的三棱柱 (TP) 几何形状,畸变角φ低于 4°。这种类似 TP 的几何形状是由 NH 基团和顶端抗衡离子之间的氢键辅助的。缺乏甲基使它们接近理想的TP。相比之下,含甲基配合物中出现了更强的 N-H⋯Cl 氢键,而 Co-N 键长保持不变,平均为