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[Co(en)(NH3)Cl3]Br is a coordination complex. Here's a breakdown:
Central Metal Ion: Cobalt (Co) in the +3 oxidation state.
Ligands:
Ethylenediamine (en): A bidentate ligand that forms two coordinate bonds.
Ammonia (NH3): A monodentate ligand.
Chloride (Cl): A monodentate ligand.
Counterion: Bromide (Br-)