Practice question
Question
What is the IUPAC name of [Co(NH₃)4(H₂O)Cl]Cl₂?
Explanation
Ligands are named alphabetically: ammine (NH₃), aqua (H₂O), chlorido (Cl). There are 4 NH₃, 1 H₂O, and 1 Cl in the complex. Co’s oxidation state is +3 (since [Co(NH₃)4(H₂O)Cl]2+ balances 2 Cl−). Name: tetraammineaquachloridocobalt(III) chloride.
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