Résumé Reduction of an unsymmetrically substituted α-diimine followed by condensation with PCl3 yielded a P-chloro-N-aryl-N′-alkyl diazaphospholene which was further converted into an unsymmetrical diazaphospholium triflate by reaction with trimethylsilyl triflate. Reaction of tetramers of N-H- or N-alkyl-benzo-1,3,2-diazaphospholes with methyl triflate or triflic acid led in one step to triflate salts of unsymmetrically substituted benzo-1,3,2-diazaphospholium cations. Determination of the crystal structures of two of these derivatives by single-crystal X-ray diffraction studies revealed that individual cations and anions in the crystal lattice interact via specific electrostatic, π-stacking, or van-der-Waals type interactions to form supramolecular assemblies. Thermoanalytical measurements disclosed that benzo-diazaphospholium triflates with medium length alkyl chains melt below 100 °C and exhibit a strong tendency to form supercooled liquids. Supplementary Materials: Supplementary materials for this article are supplied as separate files: mmc1.pdf mmc2.pdf mmc3.pdf
摘要 将不对称取代的 α-二
亚胺还原,然后与 PCl3 缩合,得到 P-
氯-N-芳基-N′-烷基二氮
磷烯。N-H- 或 N-烷基-苯并-1,3,2-二氮
磷烯四聚体与三
氟甲基
甲烷或三
氟甲酸反应,可一步生成不对称取代的苯并-1,3,2-二氮
磷鎓阳离子的三
氟酸盐。通过单晶 X 射线衍射研究确定了其中两种衍
生物的晶体结构,发现晶格中的单个阳离子和阴离子通过特定的静电、π 堆积或范-德-瓦尔斯类型的相互作用形成超分子组装。热分析测量结果表明,具有中等长度烷基链的苯并二氮杂
磷三
环酸盐会在 100 °C 以下熔化,并表现出形成过冷液体的强烈倾向。 补充材料: 本文的补充材料以单独文件形式提供: mmc1.pdf mmc2.pdf mmc3.pdf