The IUPAC name of the complex [Ag(NH3)2][Ag(CN)2] is ............

The correct answer is Option (1) → diamminesilver(I)dicyanidoargentate(I)

Both ions are named, cation first; the anionic silver takes the “-ate” name, argentate.

Find the oxidation state of silver in each ion:

    \( \displaystyle [\mathrm{Ag(NH_3)_2}]^{+}:\ x+2(0)=+1\ \Rightarrow\ x=+1 \)

    \( \displaystyle [\mathrm{Ag(CN)_2}]^{-}:\ x+2(-1)=-1\ \Rightarrow\ x=+1 \)

So the cation is diamminesilver(I) and the anion is dicyanidoargentate(I), and the name is diamminesilver(I) dicyanidoargentate(I).

Why the other options are incorrect

• Option (2) diammineargentate(I)dicyonidosilver(I) — Incorrect. The “-ate” ending belongs to the anion, not the cation; and “cyonido” is not a ligand name (\( \ce{CN^{-}} \) is cyanido).

• Option (3) diaminosilver(II)dicyanidoargentate(0) — Incorrect. \( \ce{NH3} \) is named ammine, not amino; and silver is +1 in both ions, not +2 and 0.

• Option (4) diammensilver(II)dicyanoargentate(0) — Incorrect. “Diammen” is not a ligand name, and silver is +1 in both ions, not +2 and 0.

NCERT (2026-27 edition):
Naming of Mononuclear Coordination Compounds – …

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