An efficient cyclization between nitro-substituted benzoic acids and nitro-substituted benzohydrazides affords 1,3,4-oxadiazoles. Facile synthesis and a broad substrate scope produce a range of compounds, some of them with potential as high-energy compounds. Heats of formation (ΔHf) and densities (ρ) were calculated, and heats of decomposition (ΔHd) and combustion (ΔHc) were determined experimentally
硝基取代的
苯甲酸和硝基取代的苯甲酰
肼之间的有效环化得到 1,3,4-恶二唑。简便的合成和广泛的底物范围产生了一系列化合物,其中一些具有作为高能化合物的潜力。计算形成热 (ΔHf) 和密度 (ρ),并通过实验确定分解热 (ΔHd) 和燃烧 (ΔHc)。7种合成化合物的密度通过气体比重测定法测定,并使用EXPLO5程序计算各自的爆速(VD)、爆压(PD)和比冲(I
SP)值。2-(2,4-
二硝基苯基)-5-(3,5-
二硝基苯基)-1,3,4-恶二唑 (4n) 的 X 射线结构揭示了分子的非平面性并提供了晶体密度1.698(在 120 K),接近比重值 1。