Which of the following ion does not follow EAN rule? — Coordination Compounds Chemistry Question

💡 Solution & Explanation

Here, according to EAN rule, the value of EAN should be equal to the atomic number of the closest noble gas. Value of EAN is given by, EAN =[Z-(O.S)+2(C.N)] So, 4- 6 - 2 2- 6 (a) Fe(CN) EAN=26-2+2(6)=36 (b) Ag(CN) EAN=47-1+2(2)=50 (c) Pt(Cl) EAN=78-4+2(6)=86 So, except option (b), others have their EAN equal to the atomic number of nearest noble gas. Hence, option (b) is the correct answer.