It is named diamminesilver(I) dicyanidoargentate(I). The Roman numerals indicate the oxidation state of silver, which is +1. The name also reflects the ligands present in the complex cations.
How is the coordination compound [Ag(NH₃)₂][Ag(CN)₂] named, and what information is provided by the Roman numerals in parentheses?
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The coordination compound [Ag(NH₃)₂][Ag(CN)₂] is named as diamminesilver(I) dicyanidoargentate(I). In this nomenclature, “diamminesilver(I)” indicates the cationic complex, and “dicyanidoargentate(I)” represents the anionic complex. The Roman numeral (I) in parentheses denotes the oxidation state of silver in each complex ion. In the cation, Ag⁺ has an oxidation state of +1, and in the anion, [Ag(CN)₂]⁻, Ag⁺ also has an oxidation state of +1. The Roman numerals clarify the charge carried by the silver ions in the two distinct coordination environments within the compound.