Question

The IUPAC name $\left[Ni\right(N{H}_3{)}_4\left]\right[NiC{l}_4]$ is :

• A. $\text{tetrachloronicked(II) tetraaminenickel(II)}$
• B. $\text{tetramminenickel(II) tetrachloronickel(II)}$
• C. $\text{tetraamminenickel(II) tetrachloronickelate(II)}$
• D. $\text{tetrachloronickel(II) tetraaminenickelate(0)}$

Answer 1

The correct option is C $\text{tetraamminenickel(II) tetrachloronickelate(II)}$

IUPAC naming of coordination compound:

The names of coordination compounds are derived by the following principles of nomenclature,
1. The cation is named first in both positively and negatively charged coordination entities.
2. The ligands are named in an alphabetical order before the name of the central atom/ion.

The IUPAC name of $\left[Ni\right(N{H}_3{)}_4\left]\right[NiC{l}_4]$ is $\text{tetraamminenickel(II) tetrachloronickelate(II)}$
(In both cation and anion, oxidation state of nickel is +2.)
Hence option C is correct.