4,4'-bipyridinium hyponitrite | 226952-11-0

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡啶及其衍生物
• 英文名称: 4,4'-bipyridinium hyponitrite
• 英文别名: (E)-dioxidodiazene;4-pyridin-1-ium-4-ylpyridin-1-ium
• CAS: 226952-11-0
• 化学式: C₁₀H₈N₂*H₂N₂O₂
• 分子量: 218.215
• InChiKey: UAUAKBRVYOTHQU-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.42
• 重原子数：
  16
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  99.1
• 氢给体数：
  2
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  4,4'-联吡啶 、 silver hyponitrite 在 HCl 作用下， 以 乙醚 为溶剂， 以48%的产率得到4,4'-bipyridinium hyponitrite
  参考文献：
  名称：

  Synthesis and Characterization of Alkylammonium Hyponitrites and Base-Stabilized Hyponitrous Acid Salts

  摘要：

  A number of alkylammonium and bipyridinium salts of hyponitrous acid, namely, N,N,N',N'-tetraethylethylene-diammonium (3 and 4), N,N,N',N'-tetramethylethylenediammonium (5), triethylenediammonium (6), diquinuclidinium (7), 2,2'-bipyridinium (8), 4,4'-bipyridinium (9), 4,4'-trimethylenebis(1-methylpiperidinium) (10), 4,4'-trimethylenepiperidinium (11), and bis(triethylammonium) (12) hyponitrite salts, have been synthesized by the reaction of the corresponding amine in either anhydrous diethyl ether or absolute ethanol with hyponitrous acid solution in anhydrous diethyl ether. Single-crystal X-ray crystallographic data were obtained for sodium hyponitrite (1), and the thermal decomposition behavior of the salt was examined. The new salts were characterized by LR and Raman spectroscopic data and elemental analyses. Compounds 4 and 7-9 were also characterized by single-crystal X-ray crystallography. The hyponitrite anions in 1 and 7-9 exhibit similar structural features. The anions are planar with average N=N and N-O bond distances of 1.237 and 1.380 Angstrom, respectively. The monoprotonated hyponitrite anion and solvated hyponitrous acid molecules present in 4 also exhibit close structural similarity to the dianion in the crystals of 1 and 7-9. Most of these salts are soluble in organic solvents. The UV-vis spectra of the sodium and alkylammonium salts (1, 3-7, and 10-12) in aqueous 0.1 M NaOH exhibit an absorption peak at 248 nm (lambda(max)) with a molar extinction coefficient of 7033 +/- 153 M-1 cm(-1). Differential scanning calorimetric data for the salts reveal exothermic decomposition of the hyponitrite species. Significantly, the pentahydrate and anhydrous forms of Na2N2O2 exhibit distinct thermal decomposition behavior. The thermogram of the pentahydrate exhibits two exotherms at ca. 96 and 382 degrees C, whereas that of the anhydrous Na2N2O2 exhibits a single exotherm at ca. 382 degrees C. The exotherm at 96 degrees C observed for the pentahydrate is explained in terms of a coupled phase transition-dehydration process. The alkylammonium and bipyridinium salts undergo exothermic decomposition at a considerably lower temperature in the range 67-170 degrees C. Electrochemistry of the salts in acetonitrile solvent reveal an irreversible oxidation at similar to 1.80 V vs an Ag/AgCl reference electrode.

  DOI：

  10.1021/ic981340c