What is the correct IUPAC name for the complex ? — Coordination Compounds Chemistry Question

💡 Solution & Explanation

The cation $K^+$ is named first without a numerical prefix. The coordination sphere is anionic, so the metal gets the suffix '-ate' (ferrate). Oxidation state of Fe is $+3 + x + 3(-2) = 0 \Rightarrow x = +3$. Name is Potassium trioxalatoferrate(III).