We describe a four step synthesis of new 1,3-dihydrobenzodiazaphospholes 3 and 6a-c, which posses one (3) or two (6a-c) N-acyl diazaphospholine moieties. Only the formation of alkaline-earth cation complexes, with 6a-c has been observed by IR and UV spectroscopies.
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
Benzo-1,3,2-diazaphospholide and benzo-1,3,2-diazaphospholium: an isoelectronic aromatic anion–cation pair
Isoelectronic benzo-1,3,2-diazaphospholium cations and benzo-1,3,2-diazaphospholide anions were prepared from the same phosphazane precursor; both species display according to computational studies similar aromaticity as the neutral benzo-1,3,2-diazaphosphole but are chemically more stable due to their ionic nature.
Nitcheu, Serge Kaji T.; Malavaud, Christian; Lopez, Lucien, Phosphorus, Sulfur and Silicon and the Related Elements, 1993, vol. 75, # 1-4, p. 245 - 248
作者:Nitcheu, Serge Kaji T.、Malavaud, Christian、Lopez, Lucien、Rodi, Youssef Kandri、Essassi, El Mokthar
DOI:——
日期:——
Malavaud, Christian; N'Gando M'Pondo, Teophile; Lopez, Lucien, Canadian Journal of Chemistry, 1984, vol. 62, p. 43 - 50