Among the following statements, ident ify the correct ones for complex...
Correct statement for Complexes of Lanthanide (III) Ion
Complexes of Lanthanide (III) Ion have some unique properties, and among the given statements, the correct one is:
D) The magnetic moments are not accounted even approximately by spin only value for the majority of lanthanides.
Explanation:
The Lanthanide (III) ions have partially filled f-orbitals, which make them unique from other transition metals. Due to the presence of f-orbitals, these ions have more complex electronic configurations, and their magnetic properties are also different from other transition metals.
The magnetic moments of Lanthanides are not accounted for by spin-only values because of the following reasons:
- In Lanthanides, the f-orbitals are shielded from the ligands, and the electrons in f-orbitals interact weakly with the ligand field. Due to this weak interaction, the spin-orbit coupling is small, and the magnetic moments are not explained by the spin-only values.
- In Lanthanides, the electrons in f-orbitals have a strong correlation with each other, and they behave like a single entity. This correlation effect is not considered in spin-only values, and hence the magnetic moment is not accounted for by spin-only values.
- The Lanthanides have complex electronic configurations, and they exhibit multiple oxidation states. Due to this complexity, the magnetic properties of Lanthanides are not straightforward, and they cannot be explained by simple spin-only values.
Hence, the correct statement among the given options is D, i.e., the magnetic moments of Lanthanides are not accounted even approximately by spin-only values.