IUPAC name of the complex ${\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]}^{+}{\left[\mathrm{Ag}{\left(\mathrm{CN}\right)}_2\right]}^{-}$ is

${\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]}^{+}{\left[\mathrm{Ag}{\left(\mathrm{CN}\right)}_2\right]}^{-}$

Both cation and anion are complexes.

Cation is named first, while naming the cation

a) Ligands are named first with proper prefix

b) Central metal is named next with oxidation number in parenthesis as a roman number

c) ${\mathrm{NH}}_3$ is called ammine. It is a neutral ligand.

$\therefore$diamminesilver (I)

Anion is named next, while naming the anion

a) Ligands are named first with proper prefix

b) Central metal is named using a suffix ‘ate’ after its name along with oxidation number in parenthesis as a roman number

c) ${\mathrm{CN}}^{-}$ is called cyano (or) cyanido. It is a negative ligand.

$\therefore$dicyanidoargentate (I)

IUPAC name is diammine silver(I) dicyanidoargentate (I)