Question

What is the IUPAC name of $K_3\left[Fe{\left(CN\right)}_6\right]$?

• A. Tripotassium hexacyanoferrate$\left(III\right)$
• B. Potassium hexacyanoferrate$\left(III\right)$
• C. Potassium hexacyanoferrate$\left(II\right)$
• D. Tripotassium hexacyanoferrate$\left(II\right)$

Answer 1

The correct option is B Potassium hexacyanoferrate$\left(III\right)$

IUPAC name of $K_3\left[Fe{\left(CN\right)}_6\right]$ is Potassium hexa cyano ferrate(III). Also, following are the steps that are followed while writing the IUPAC name of a coordination compound.

$1.$ Positive part of the compound is named first, then negative part.

$2.$ Ligands are named first then the central atom.

$3.$ Di, tri and tetra represent the number of ligands.

$4.$ Bis, tris, tetrakis represent the number of complex ligands.

$5.$ Anionic ligands and with $o$ or $ido$ .

$6.$ Oxidation state of the central metal atom in roman after the metal.

$7.$ When the coordination entity has a negative charge, the central metal atoms name ends with a negative.