[Co(NH3)5(H2O)]Br3 : Aquopentaamminecobalt(III) tribromide
Cobalt atom coordinated in an octahedral geometry to 5 NH3 and one water ligands. All bromides are not coordinating.
[Co(NH3)5Br]Br2 : Bromopentaamminecobalt(III) dibromide
Cobalt atom coordinated in an octahedral geometry to 5 NH3 and one bromide ligands. Two bromides are not coordinating.