What is EAN of metal ion in hexacyanoferrate (II) ion?

Step-by-step solution

The Effective Atomic Number (EAN) for the metal ion in [ Fe ( CN )₆]⁴⁻ is determined through systematic analysis of its electronic configuration. The central metal ion is iron with atomic number Z = 26 . The oxidation state calculation yields x + 6 (-1) = -4 , resulting in x = +2 for Fe ²⁺ . The number of electrons in Fe ²⁺ is 26 - 2 = 24 . Each cyanide ligand donates 2 electrons, with 6 ligands contributing 6 2 = 12 electrons. EAN = 24 + 12 = 36 Therefore, the Effective Atomic Number is 36 .