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प्रश्न
Explain the difference between a weak field ligand and a strong field ligand.
उत्तर
| Sr. No. | Weak field ligand | Strong field ligand |
| 1. | Those ligands whose crystal field splitting energy (CFSE), Δ0 has a low value are called weak field ligands. | Those ligands whose crystal field splitting energy, Δ0 has a high value are called strong field ligands. |
| 2. | Due to weak field ligands, there is no pairing of electrons and they form high-spin complexes. | Due to strong field ligands, there is pairing of electrons and they form low-spin complexes. |
संबंधित प्रश्न
State the superiority of crystal field theory over valence bond theory.
Draw the structures of the following :
(1) XeF6
(2) IF7
The CFSE for octahedral \[\ce{[CoCl6]^{4-}}\] is 18,000 cm–1. The CFSE for tetrahedral \[\ce{[CoCl4]^{2-}}\] will be ______.
On the basis of crystal field theory explain why Co(III) forms paramagnetic octahedral complex with weak field ligands whereas it forms diamagnetic octahedral complex with strong field ligands.
Match the complex ions given in Column I with the hybridisation and number of unpaired electrons given in Column II and assign the correct code:
| Column I (Complex ion) | Column II (Hybridisation, number of unpaired electrons) |
| A. \[\ce{[Cr(H2O)6]^{3+}}\] | 1. dsp2, 1 |
| B. \[\ce{[Co(CN)4]^{2-}}\] | 2. sp3d2, 5 |
| C. \[\ce{[Ni(NH3)6]^{2+}}\] | 3. d2sp3, 3 |
| D. \[\ce{[MnF6]^{4-}}\] | 4. sp3, 4 |
| 5. sp3d2, 2 |
In a coordination entity, the electronic configuration of the central metal ion is t2g3 eg1
Draw the crystal field splitting diagram for the above complex.
The CFSE of [CoCl6]3– is 18000 cm–1 the CFSE for [CoCl4]– will be ______.
Using crystal field theory, write the electronic configuration of d5 ion, if Δ0 > P.
What is the difference between a weak field ligand and a strong field ligand?
On the basis of Crystal Field theory, write the electronic configuration for the d5 ion with a strong field ligand for which Δ0 > P.
