1,5-Diazabicyclo[3.1.0]hexane type compounds (DABHCs) were found as promising liquid hypergolic compounds. The synthesis process and purification of DABHCs, 1,5-diazabicyclo[3.1.0]hexane (DABH), 6-methyl-1,5-diazabicyclo[3.1.0]hexane (MDABH), 6-ethyl-1,5-diazabicyclo[3.1.0]hexane (EDABH), and 6,6-dimethyl-1,5-diazabicyclo[3.1.0]hexane (DDABH) were optimized. The densities of DABHCs were over 1.0 g/mL, and the viscosities of DABHCs were about 2.40–2.63 mPa·s. The boiling points of DABHCs exhibited that they were less volatile, and the freezing points of DABHCs varied considerably for different alkylation. The LD50 predicted values of DABHCs were within 1605.62–4865.43 mg/kg, which demonstrated that DABHCs were grade IV, slightly poisonous, or grade V, nontoxic, compounds according to the Globally Harmonized System of Classification and Labeling of Chemicals (GHS). In addition, the heats of formation of DABHCs were calculated as 129.2–276.2 kJ/mol, higher than those of monomethyl hydrazine, unsymmetrical di...

中文翻译：

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1,5-二氮杂双环[3.1.0]己烷类化合物作为潜在绿色自燃推进剂的合成及点火性能研究

1,5-二氮杂双环[3.1.0]己烷类化合物（DABHCs）被发现是有前途的液体自燃化合物。DABHCs、1,5-二氮杂双环[3.1.0]己烷(DABH)、6-甲基-1,5-二氮杂双环[3.1.0]己烷(MDABH)、6-乙基-1,5-的合成工艺及纯化二氮杂双环[3.1.0]己烷（EDABH）和6,6-二甲基-1,5-二氮杂双环[3.1.0]己烷（DDABH）进行了优化。DABHCs的密度超过1.0 g/mL，DABHCs的粘度约为2.40~2.63 mPa·s。DABHCs 的沸点表明它们的挥发性较低，并且 DABHCs 的凝固点因不同的烷基化而有很大差异。DABHCs的LD50预测值在1605.62-4865.43 mg/kg之间，表明DABHCs为IV级，微毒，或V级，无毒，符合全球化学品统一分类和标签制度 (GHS) 的化合物。此外，DABHCs的生成热计算为129.2-276.2 kJ/mol，高于单甲基肼、不对称二...