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Streamlining the Organometallic compounds

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Stability of the transition metal complex: Elements tend to achieve the stability by making low energy compounds. Organometallic compounds are the same. They are stable because they are lesser in energy with compared to their individual forms. Scientists found that most of these metal complexes have 18 electrons in the metal valence shell.  Application of the 18 electrons rule **lets simplify the 18 e rule** 1 step: Count the number of electrons in the valence shell of the metal 2 step: get the d n configuration 3 step: count the total number of electrons donate by the ligands 4 step: make corrections for the charge **Here is an example to make this easier to understand** Example 01;  Fe(CO)5  Step 1; Iron belongs to the d block of the periodic table. [Ar]3d64s2 Step 2; d n   configuration  = d 8 Step 3; Each carbonyl donates 2 electrons. 2*5=10 Step 4; well this compound is a neutral one. Therefore charge co...