Question

Correct name of diammine silver $(I)$ chloride is:
$A)Ag(N{H_3})Cl$
$B)Ag(N{H_2})Cl$
$C)Ag{(N{H_3})_2}Cl$
$D)Ag{(N{H_2})_2}Cl$

Answer 1

Coordination compounds are neutral substances in which at least one ion is present as a complex. A. To name a coordination compound, no matter whether the complex ion is the cation or the anion, always name the cation before the anion.

Complete answer:
$-$ When naming a complex ion, the ligands are named before the metal ion.
$-$ Write the names of the ligands in the following order neutral, negative, positive. If there are multiple ligands of the same charge type, they are named in alphabetical order.
$-$ Multiple occurring monodentate ligands receive a prefix according to the number of occurrences: $di -$ , $tri -$ , $tetra -$ , $penta -$ , or $hexa$ . Polydentate ligands receive $bis -$ , $tris -$ , $tetrakis -$ , etc.
$-$ Anions end in $- ido$ . This replaces the final $- e$ when the anion ends with $- ate$ and replaces $- ide$ .
$-$ Neutral ligands are given their usual name, with some exceptions $N{H_3}$ becomes amine ${H_2}O$ becomes aqua or aquo $CO$ becomes carbonyl $NO$ becomes nitrosyl.
$-$ Write the name of the central atom. If the complex is an anion, the central atom’s name will end in $- ate$ .
$-$ If the central atom’s oxidation state needs to be specified, write it as a Roman numeral in parentheses.
$-$ End with cation or anion as separate words.
So, the correct answer is $(C) Ag{(N{H_3})_2}Cl$ .

Note:
More complicated coordination compounds are composed of an atom or ion and a surrounding array of bound molecules or anions, known as ligands. The atom within a ligand that is bonded to the central atom or ion is called the donor atom. A typical complex is bound to several donor atoms, which can be the same or different.