Differentiate between weak field and strong field ligands.
How does the strength of the ligand influence the spin of the complex?
Solution and Explanation
Strong field ligands cause a large splitting of d-orbitals, which results in electron pairing and low-spin configuration with fewer unpaired electrons. Examples of strong field ligands include CO and CN−.
Top Questions on Coordination chemistry
Werner’s coordination theory in 1893 was the first attempt to explain the bonding in coordination complexes. It must be remembered that this theory was put forward before the electron had been discovered by J.J. Thomson in 1897, and before the electronic theory of valency. Werner did not have any of the modern instrumental techniques and all his studies were made using simple experimental techniques. Werner was able to explain the nature of bonding in complexes and he concluded that in complexes, the metal shows two different sorts of valency: primary and secondary. Primary valences are normally ionisable whereas secondary valences are non-ionisable.
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