What is the oxidation number for Fe in FeBr?

Fe has an oxidation number of
  • +2 in ferrous salts
  • +3 in ferric salts

As Br has an oxidation number of -1 in bromide, only two salts of Fe with Br are possible:
  • FeBr2 = ferrous bromide
  • FeBr3 = ferric bromide
  • and FeBr DOES NOT EXIST