Question

The IUPAC name of the complex [Ag(H₂O)₂][Ag(CN)₂] is:

• A. dicyanidosilver(II) diaquaargentate(II)
• B. diaquasilver(II) dicyanidoargentate(II)
• C. dicyanidosilver(I) diaquaargentate(I)
• D. diaquasilver(I) dicyanidoargentate(I)

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
This is a coordination compound consisting of both a cationic coordination sphere and an anionic coordination sphere. Silver (Ag) commonly exists in the $+1$ oxidation state in such complexes.
Step 2: Detailed Explanation:
1. Splitting the complex:
The complex consists of the cation $[Ag(H_2O)_2]^+$ and the anion $[Ag(CN)_2]^-$.

2. Determining Oxidation States:
In $[Ag(H_2O)_2]^+ \rightarrow x + 2(0) = +1 \implies x = +1$.
In $[Ag(CN)_2]^- \rightarrow y + 2(-1) = -1 \implies y = +1$.
Both Silver atoms are in the $+1$ oxidation state.

3. Naming the Cation $[Ag(H_2O)_2]^+$:
- Ligands: Two water molecules $\rightarrow$ "diaqua".
- Metal: Silver (since it's a cation) $\rightarrow$ "silver(I)".
- Cation name: "diaquasilver(I)".

4. Naming the Anion $[Ag(CN)_2]^-$:
- Ligands: Two cyanide ions $\rightarrow$ "dicyanido".
- Metal: Silver in an anion takes the suffix "-ate" and its Latin name (Argentum) is used $\rightarrow$ "argentate(I)".
- Anion name: "dicyanidoargentate(I)".

5. Combining the names:
"diaquasilver(I) dicyanidoargentate(I)".
Step 3: Final Answer:
The IUPAC name is diaquasilver(I) dicyanidoargentate(I).