Question

Write the IUPAC names of the following coordination compound: \(K_2[Ni(CN)_4]\)

Hint:

When naming coordination complexes, remember to include the oxidation state of the central metal and the number of ligands.

Answer 1

Step 1: Identify the ligands. The ligand in this compound is cyanide \((CN^-)\), which is a monodentate ligand.

Step 2: Identify the oxidation state of the metal. Nickel (Ni) in this compound is in the +2 oxidation state, because the four cyanide ions \((CN^-)\) each carry a -1 charge, and the overall charge of the complex is 0. Thus, the charge on Ni must be +2.

Step 3: Write the IUPAC name. The IUPAC name is: Tetrachloronickel(II).