Question

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

• A. Tetrachloridonickel$\left(II\right)$-tetraamminenickel$\left(II\right)$
• B. Tetraamminenickel$\left(II\right)$-tetrachloridonickel$\left(II\right)$
• C. Tetraamminenickel$\left(II\right)$-tetrachloronickelate$\left(II\right)$
• D. Tetrachloridonickel$\left(II\right)$-tetraamminenickelate$\left(II\right)$

Answer 1

Answer: (C)

Tetraamminenickel$\left(II\right)$-tetrachloronickelate$\left(II\right)$

The I.U.P.A.C name for $\left[Ni\right(N{H}_3{)}_4\left]\right[NiC{l}_4]$ is :

tetraamminenickel$\left(II\right)$-tetrachloronickelate$\left(II\right)$

The name of the complex cation is written first followed by the name of the complex anion.
Complex cation contains four ammine ligands and complex anion contains 4 chloride ligands.

The oxidation state of $Ni$ is written in parenthesis in roman numerals.