Question

What is IUPAC name of $\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]\left[\mathrm{Ag}{\left(\mathrm{CN}\right)}_2\right]$?

Answer 1

Nomenclature or IUPAC name of Coordination Compounds

• The cation's name comes first, followed by the anion's name.
• The ligand or ligands' name comes before the name of the central metal atom.
• If the ligand is negative, the name usually ends in 'o', and if the ligand is neutral, it usually ends in 'unmodified.'
• The number of ligands is indicated by a Greek prefix, such as mono, di, tri, tetra, penta, hexa, and so on.
• The oxidation number of the central metal atom is indicated by a Roman numeral or a zero in parenthesis.
• The name of the metal ends in 'ate' if the complex ion is negative, such as ferrate, cuprate, nickelate, cobaltate, and so on.
• If the species contains more than one ligand, the ligands are called in alphabetical order, regardless of their number.

IUPAC name of $\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]\left[\mathrm{Ag}{\left(\mathrm{CN}\right)}_2\right]$

• The silver ion is called argentate as an anion because it is named after the element silver, and as a cation, because it has the suffix –ate.
• The IUPAC name of $\left[\mathrm{Ag}{\left({\mathrm{NH}}_3\right)}_2\right]\left[\mathrm{Ag}{\left(\mathrm{CN}\right)}_2\right]$ is diammine silver (I) dicyanidoargentate(I).