tetraphosphorus tetraselenide | 226407-89-2

• 分子结构分类: 无机化合物 - 均质非金属化合物 - 均质其他非金属化合物
• 英文名称: tetraphosphorus tetraselenide
• 英文别名: tetraphosphorus tetraselenide P4Se4, α
• CAS: 226407-89-2
• 化学式: P₄Se₄
• 分子量: 439.735
• InChiKey: BDSWHXZEBZILNU-UHFFFAOYSA-N

反应信息

• 作为产物：
  描述：

  selenium 、 Tetraphosphorous triselenide 以 neat (no solvent) 为溶剂， 生成 tetraphosphorus tetraselenide
  参考文献：
  名称：

  Phases of tetraphosphorus triselenide analysed by magic angle spinning 31P NMR and Raman spectroscopy, and the Raman spectrum of tetraphosphorus tetraselenide

  摘要：

  The local environments of the cage molecules in the phases of P4Se3 are analysed with P-31 MAS-NMR and Raman spectroscopy.The P-31 MAS-NMR spectra of the orientationally ordered alpha and alpha'-phases have different chemical shifts for the apical P atom (alpha: 68.0, 86 and 88.0 ppm; alpha': 75.8 ppm), but similar chemical shifts for the basal P atoms (alpha: -58.8 ppm, alpha': -60.0 ppm).When either alpha or alpha'-P4Se3 is heated above 358 K, the resulting beta-P4Se3 has a well-resolved, liquid-like spectrum, indicating extensive molecular re-orientation. The slowly quenched beta-phase shows a remnant beta-phase mixed with the alpha-phase as well as P4Se4. A rapidly quenched sample of beta-P4Se3 also shows a small remnant beta-phase in the alpha-phase, but also a new phase with sharp resonances at 12.5, 3.6, 0.1 and -12 ppm. These are probably due to a P4Se4 phase which may be orientationally disordered.The Raman spectrum of P4Se3 heated above the alpha-beta phase transition temperature shows a disappearance of the lattice modes and the 373 cm-1 mode as previously reported, but also shows some decomposition to P4Se4. The beta-phase reverts into the alpha-phase on quenching, with only weak remnant bands attributable to P4Se4. The bands of P4Se4 become more prominent as the temperature of the beta-phase is raised, but above the beta-gamma phase transition they are less prominent.The Raman spectrum of P4Se4 is reported. The strongest band is at 350 cm-1, with the next strongest band at 185 cm-1. The spectra indicate that the dominant isomer is the selenium analogue of alpha-P4S4 (D2h), confirming previous P-31 MAS-NMR studies.

  DOI：

  10.1016/0584-8539(91)80153-a