What is the oxidation number of Fe in [Fe(H2O)5(NO)]2+ ion? — Coordination Compounds Chemistry Question

💡 Solution & Explanation

Step 1: The complex [Fe(H2O)5(NO)]^2+ represents the brown ring complex. Step 2: In this complex, nitric oxide coordinates as the nitrosonium cation (NO^+), which carries a +1 charge. Water is a neutral ligand. Step 3: Calculating the oxidation state of Fe (x): x + 5*(0) + 1*(+1) = +2 => x = +1. Thus, the oxidation state of Fe is +1, matching option (c).