

Two ligands are attached to central metal atom so, coordination number is 2.ĮAN = 50 9.Calculate the EAN of Silver in + complex? Calculate the EAN of Iron in 3- complex?ĮAN = 35 8. Calculate the EAN of Manganese in 4- complex?ĮAN = 35 7. Calculate the EAN of Cupper in 2+ complex?ĮAN = 35 6. Calculate the EAN of Cobalt in 2- complex?ĮAN = 33 5. Calculate the EAN of Chromium in 3+ complex?ĮAN = 33 4. Calculate the EAN of Nickel in 2+ complex?ĮAN = 38 3. Calculate the EAN of Nickel in 2- complex?ĮAN = 34 2. Many stable complexes are known in which the effective atomic number rule is not obeyed. There are many exceptions to the effective atomic number rule. Complexes Which Do Not Obey Effective Atomic Number Rule The effective atomic number of Pd is 54, which is the electronic configuration of inert gas Xenon. Calculate the EAN of Palladium in 4+ complex? The effective atomic number of Pt is 86, which is the electronic configuration of inert gas Radon.

Calculate the EAN of Platinum in 2- complex? The effective atomic number of Mo is 54, which is the electronic configuration of inert gas Xenon. Calculate the EAN of Molybdenum in complex? The effective atomic number of Fe is 36, which is the electronic configuration of inert gas krypton. The effective atomic number of Cu is 36, which is the electronic configuration of inert gas krypton. Calculate the EAN of Copper in 3- complex?

Now we calculate the effective atomic number of hexaminecobalt (|||) ion, 3+. For example, after the formation of complex K 4, (the central metal atom is Fe) how many electrons are present in Fe? This is known as the effective atomic number rule. Sidgwick’s suggested that the central metal ion will continue to accept the electron pair till it achieves the next inert gas electronic configuration. The total number of electrons present in the Central metal atom after the formation of the complex is called the effective atomic number (EAN). Sidgwick’s Effective Atomic Number Rule (EAN Rule) For example, the net charge on the above complex ion is +3 because C03+ possesses a +3 oxidation state and NH 3 is a neutral molecule so, 3+0 is equal to 3. The net charge on the complex ion is equal to the algebraic sum of the oxidation state of the central metal atom and the charge on the ligands.
