Question

Select the correct IUPAC Name of $K_2\left[Cd\right(CN{)}_4]$ :

• A. potassium tetracyanidocadmate$\left(II\right)$
• B. potassium tetracyanidocadmate$(III)$
• C. both A and B
• D. none of these

Answer 1

The correct option is A potassium tetracyanidocadmate$\left(II\right)$

Option (D) is correct. The correct IUPAC name of $K_2\left[Cd\right(CN{)}_4]$ is potassium tetracyanocadmate$\left(II\right)$.

In this complex there are four $CN$ so they are named as tetracyanido and cyanide ligand has -1 charge. So the cadmium overall has -2 charge, so the name of cadmium with -ate followed by the charge in roman letters.