• # question_answer Direction: The dissociation of complex may be expressed as ${{[M{{L}_{x}}]}^{4+}}\,+xL$ and equilibrium constant of this is known as instability constant which is a measure of stability. The stability of complex depends on EAN of central atom, charge on metalion, basic nature of ligand and chelation. Which one of the following does not follow EAN rule? A)  $Fe{{(CO)}_{5}}$              B)  $V{{(CO)}_{6}}$ C)  ${{K}_{4}}[Fe{{(CN)}_{6}}]$      D)  $M{{n}_{2}}{{(CO)}_{10}}$

EAN of V is 35. (EAN $=23+6\times 2=35$)