IGNOU MCH 11 2026 2027 - With the help of suitable diagrams, explain the synergic bonding in me

Question

With the help of suitable diagrams, explain the synergic bonding in metal carbonyls.

17 Jul 2026

Answer :

Word Count : 314

Synergic bonding in metal carbonyls is a unique type of chemical bonding found in metal carbonyl complexes, where both the metal atom and the carbon monoxide (CO) ligand mutually strengthen each other's bonding through simultaneous electron donation and back-donation. This interaction explains the remarkable stability and structural characteristics of metal carbonyl compounds. The bonding involves two complementary processes: (i) σ-Donation (Ligand to Metal) The carbon atom of the CO molecule possesses a lone pair of electrons in a filled orbital. This lone pair is donated to an empty orbital of the transition metal, forming a σ-bond. ``` :CO ─────► M (lone pair) (empty orbital) ``` (ii) π-Back Donation (Metal to

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