Question

what is the IUPAC name of [Ni(NH3)4][NiCl4] ?

Answer 1

First cationic part of the complex is named and after that anionic part of complex is named Tetra ammine nickel(II)-tetra chloronicklate(II)

Answer 2

Answer : The IUPAC name of $[Ni(NH_3)_4][NiCl_4]$ is, Tetraamminenickel(II)tetrachloronickelate(II)

Explanation :

Rules for naming of the coordination compounds :

• The ligand named first then metal.
• The charge of metal indicated with the Roman numerals and enclosed in the parenthesis after metal name.
• The ligands are named in alphabetical order before the metal ion.
• Ligands that include a numerical prefix in the name use the prefixes bis for 2, tris for 3, or tetrakis for 4 to indicate their number.
• If the complex ion is an anion, we drop the ending of the metal name and add –ate.

In the given coordination compound, Ni is the nickel metal, Cl and $NH_3$ are the ligands named as chloro and ammine.

Hence, the IUPAC name of $[Ni(NH_3)_4][NiCl_4]$ is, Tetraamminenickel(II)tetrachloronickelate(II)