Triarylphosphanes react with elemental bromine to give triarylbromophosphonium bromides. With an excess of bromine larger polybromides are formed. The influence of the stepwise fluorination of the cation on the formed polybromide anion was investigated. The polybromide dianions and networks [(C₆H₅)₃PBr]₂[Br₁₄], [(C₆H₄F)₃PBr]₂[Br₁₄], [(C₆H₄F)₃PBr][Br₁₁], [(C₆H₂F₃)₃PBr]₂[Br₁₆], and [(C₆F₅)₃PBr]₂[Br₂₀]·Br₂ were obtained and characterized by Raman spectroscopy, single‐crystal X‐ray structure determination and quantum‐chemical calculations at the RI‐B3LYP‐D3/def2‐TZVPP level. Additionally, two further [Br₂₀]^2– dianions, [BMDIM][Br₂₀] {BMDIM = 1,12‐bis[(1‐methylbenzimidazolium)‐3‐yl]dodecane} and [AsPh₄]₂[Br₂₀]·0.5Br₂, are presented and compared to all known eicosabromide dianions.

中文翻译：

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氟化溴（三芳基）phosph阳离子稳定的多溴化物阴离子和网络

三芳基膦与元素溴反应生成三芳基溴化phosph溴化物。过量的溴会形成较大的多溴化物。研究了阳离子逐步氟化对所形成的聚溴化物阴离子的影响。多溴化物阴离子和网络[[C ₆ H ₅）₃ PBr] ₂ [Br ₁₄ ]，[（C ₆ H ₄ F）₃ PBr] ₂ [Br ₁₄ ]，[（C ₆ H ₄ F）₃ PBr] [ Br ₁₁ ]，[（C ₆ H ₂ F ₃）₃ PBr]_获得了2 [Br ₁₆ ]和[（C ₆ F ₅）₃ PBr] ₂ [Br ₂₀ ] · Br ₂，并通过拉曼光谱，单晶X射线结构确定和RI-处的量子化学计算进行了表征B3LYP-D3 / def2-TZVPP级别。此外，另外两种[Br ₂₀ ] ^2–二价阴离子[BMDIM] [Br ₂₀ ] {BMDIM = 1,12-双[（1-甲基苯并咪唑鎓）-3-基]十二烷}和[AsPh ₄ ] ₂ [Br ₂₀ ] ·给出了0.5Br ₂，并将其与所有已知的二十碳三溴化物_二价阴离子进行了比较。