Diamagnetic Lanthanoid ions are:
- Nd\(^{3+}\) and Eu\(^{3+}\)
- Nd\(^{3+}\) and Ce\(^{4+}\)
- La\(^{3+}\) and Ce\(^{4+}\)
- Lu\(^{3+}\) and Eu\(^{3+}\)
The Correct Option is C
Solution and Explanation
Step 1. Understand Diamagnetism: Diamagnetic species have all electrons paired, which means the ions should have no unpaired electrons in their electron configuration.
Step 2. Examine Electron Configurations: Ce4+: [Xe] 4f0 - All electrons are paired, hence diamagnetic. La3+: [Xe] - Also has no unpaired electrons, hence diamagnetic.
Step 3. Conclusion: La3+ and Ce4+ are both diamagnetic as they lack unpaired electrons.
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Concepts Used:
Coordination Compounds
A coordination compound holds a central metal atom or ion surrounded by various oppositely charged ions or neutral molecules. These molecules or ions are re-bonded to the metal atom or ion by a coordinate bond.
Coordination entity:
A coordination entity composes of a central metal atom or ion bonded to a fixed number of ions or molecules.
Ligands:
A molecule, ion, or group which is bonded to the metal atom or ion in a complex or coordination compound by a coordinate bond is commonly called a ligand. It may be either neutral, positively, or negatively charged.