Question: 64: The IUPAC name of the complex \left[\mathrm{Ag}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}\right]\left[\mathrm{Ag}(\mathrm{CN})_{2}\right] is:
(1) dicyanidosilver(I) diaquaargentate(I)
(2) diaquasilver(I) dicyanidoargentate(I)
(3) dicyanidosilver(II) diaquaargentate(II)
(4) diaquasilver(II) dicyanidoargentate(II)
Answer: Option (2)
Explanation:
The given compound consists of a cationic complex and an anionic complex.
The cationic part is \left[\mathrm{Ag}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}\right]^{+}.
Water is a neutral ligand, so the oxidation state of silver in this complex is +1.
The name of this cation is diaquasilver(I).
The anionic part is \left[\mathrm{Ag}(\mathrm{CN})_{2}\right]^{-}.
Each cyanide ligand has a charge of -1, giving a total ligand charge of -2.
To result in an overall charge of -1, the oxidation state of silver must be +1.
The anionic complex is therefore named dicyanidoargentate(I).
According to IUPAC rules, the name of the cation is written first, followed by the name of the anion.
Hence, the correct IUPAC name is diaquasilver(I) dicyanidoargentate(I).