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Questions
What is the difference between a weak field ligand and a strong field ligand?
Explain the difference between a weak field ligand and a strong field ligand.
Write the difference between a strong field ligand and a weak field ligand.
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Solution
| S.No. | Weak Field Ligand | Strong Field Ligand |
| 1. | A ligand that produces a small splitting of the d-orbitals in the central metal ion. | A ligand that produces a large splitting of the d-orbitals in the central metal ion. |
| 2. | These are the ligands used in octahedral complexes in which the crystal field stabilization energy Δo is less than the pairing energy (P) in a single orbital. | These are the ligands used in octahedral complexes in which the crystal field stabilization energy Δo is greater than the pairing energy (P). |
| 3. | Complexes formed by these ligands are also known as high-spin complexes. | Complexes formed by these ligands are also known as low-spin complexes |
| 4. | The complexes formed are generally paramagnetic. | The complexes formed are mostly diamagnetic or relatively less paramagnetic. |
| 5. | Examples of weak field ligands include I−, Br−, Cl−, and H2O. | Examples of strong field ligands include NH3, CN−, Co. |
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The correct statements are:
Consider that d6 metal ion (M2+) forms a complex with aqua ligands and the spin only magnetic moment of the complex is 4.90 BM. The geometry and the crystal field stabilization energy of the complex are ______.
On the basis of Crystal Field Theory, write the electronic configuration of d4 ion if Δ0 > P.
