Iron(II) bromide refers to inorganic compounds with the chemical formula FeBr2(H2O)x.

The tetrahydrates FeX2(H2O)4 (X = Cl, Br) have similar structures, with octahedral metal centers and mutually trans halides.

[2] FeBr2 is synthesized using a methanol solution of concentrated hydrobromic acid and iron powder.

It adds the methanol solvate [Fe(MeOH)6]Br2 together with hydrogen gas.

[4] FeBr2 reacts with bromide and bromine to form the intensely colored, mixed-valence species [FeBr3Br9]−.