Question

The I.U.P.A.C name for ${\left[Ni{\left(CN\right)}_4\right]}^{2-}$ is :

• A. Tetracyanidonickel (II) ion
• B. Tetracyanidonickel (0) ion
• C. Tetracyanidonickelate (II) ion
• D. Tetracyanidonickelate (0) ion

Answer 1

Answer: (C)

Tetracyanidonickelate (II) ion

Option (C) is correct. The I.U.P.A.C name for ${\left[Ni{\left(CN\right)}_4\right]}^{2-}$ is tetracyanidonickelate (II) ion.

In this complex, the are four $CN$ so they are named as tetracyanido. The complex has -2 charge, so the name of central metal atom ends with -ate followed by the charge in roman letters and ion.

Thus, the name of the complex is tetracyanidonickelate (II) ion.