What is the EAN of Fe in [ Fe ( CN )₆ ]³⁻ ?

Step-by-step solution

The Effective Atomic Number (EAN) of Fe in [ Fe ( CN )₆]³⁻ is determined using the formula: EAN = Z - OS + 2 CN where Z is the atomic number, OS is the oxidation state, and CN is the coordination number. For iron, Z = 26 . The oxidation state x satisfies x + 6 (-1) = -3 , yielding x = +3 . The complex contains six cyanide ligands, so CN = 6 . Substituting these values: EAN = 26 - 3 + 2 6 = 35 . Final answer: 35