title: Bromopentafluorobenzene
text: # Bromopentafluorobenzene
  
  Bromopentafluorobenzene is an organofluorine compound with the formula $C_6F_5Br.$ It is a colorless liquid that is used to prepare pentafluophenyl compounds. These syntheses typically proceed via the intermediacy of $C_6F_5Li$ or the Grignard reagent. Illustrative is preparation of tris(pentafluorophenyl)borane:
  
      3 $C_6F_5MgBr$ + $BCl_3$ → $(C_6F_5)_3B$ + 3 MgBrCl
  
  Other derivatives include $LiB(C_6F_5)_4,$ $[CuC_6F_5]_4,$ and $Ni(C_6F_5)_2(dioxane)_2.$
  
  