Question

What is the IUPAC name of the compound $[Ag{({H_2O})_2}][Ag{(Cl)_2}]$ ?

Answer 1

Hint : Coordination complexes are the compounds in which the central metal atom is surrounded by ligands and bonded to them through coordinate bonds. Full form of IUPAC is the International Union of Pure and Applied Chemistry. This organization has set some rules for naming of the chemical compounds which needs to be strictly followed.

Complete Step By Step Answer:
So, the process of naming the chemical compounds is known as IUPAC nomenclature.
The IUPAC rules by which naming a coordination compound is done are:-
(1) While naming the coordination complexes, ligands are always named before the central metal ion/atom.
(2) An order is followed to name the ligands: neutral, anion. If there is more than one ligand of the same type then the naming is in alphabetical order. (Numerical prefixes do not affect the order).
(3) If a monodentate ligand is repeated multiple times then prefix is written according to the number of times it is repeated: di-, tri-, tetra-, penta- or hexa is written and if polydentate ligands are present (oxalate,etc.) then prefix bis-, tris-, tetrakis-, etc. are written.
(4) For anionic ligand, naming is done by replacing ‘e’ with ‘ido’ when anion ends with ‘-ate’ and replacing ‘-ide’ by ‘-ido’ when anion ends with ‘-ide’.
(5) Neural ligands are named with their usual names except $N{H_3}$ is named as “ammine”, ${H_2}O$ is named as “aqua” and NO is named as “nitrosyl”.
(6) Now, for the central metal atom: If the complex is anion, then prefix ‘-ate’ is added otherwise the name will remain as such.
(7) Central atom’s oxidation state should be written as a Roman numeral in parentheses.
Hence, the IUPAC name of the given complex: $[Ag{(H_2O)_2}][Ag{(CN)_2}]$ is diaquasilver(I) dicyanoargentate(I).

Note :
The oxidation state should always be written in Roman numeral form in parentheses and next to the metal atom/ ion and without any space between them. For the central metal atom or ion If the complex is anion, then prefix ‘-ate’ is added otherwise the name of the central metal atom or ion will remain as such.