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Of the following statements regarding lanthanoid(III) ions/complexes,
A. the metal ion interacts weakly with ligand orbitals.
B. a large number of microstates result in large number of transitions.
C. the f orbitals are deeply buried.
D. they show strong. f-f electronic transitions.
the correct statements are
A. the metal ion interacts weakly with ligand orbitals.
B. a large number of microstates result in large number of transitions.
C. the f orbitals are deeply buried.
D. they show strong. f-f electronic transitions.
the correct statements are
- a)A, C and D only
- b)B, C and D only
- c)A, B and C only
- d)B and C only
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
Of the following statements regarding lanthanoid(III) ions/complexes,A...
- In lanthanoid(III) ions/complexes, the metal ion interacts weakly with ligand orbitals due to little d–f mixing, as the d electrons are deeply buried.
- Thus, Statment A and C are correct.
- Since the 4f electrons are well shielded and not affected by the environment of the ion, bands arising from f–f transitions are sharp (rather than broad like d–d absorptions) and their positions in the spectrum are little affected by complex formation.
- In lanthanoid(III) ions/complexes a large number of microstates result in large number of transitions.
- Thus, statement B is correct.
- Intensities of the absorptions are low, indicating that the probabilities of the f–f transitions are low.
- Thus, statement D is incorrect.
the correct statements are A, B and C only.
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Community Answer
Of the following statements regarding lanthanoid(III) ions/complexes,A...
The correct statements regarding lanthanoid(III) ions/complexes are A, B, and C only.
A. The metal ion interacts weakly with ligand orbitals:
Lanthanoid(III) ions have a partially filled 4f electron shell, which is shielded by the filled 5s and 5p orbitals. As a result, the 4f orbitals are effectively shielded from the ligand orbitals, leading to weak interactions between the metal ion and the ligands.
B. A large number of microstates result in a large number of transitions:
Lanthanoid(III) ions have a high spin ground state due to the presence of multiple unpaired f electrons. This high spin state leads to a large number of microstates, which in turn results in a large number of possible electronic transitions.
C. The f orbitals are deeply buried:
The f orbitals in lanthanoid(III) ions are located deep within the electron shell, shielded by the filled 5s and 5p orbitals. This deep burial of the f orbitals makes them less accessible to external interactions, resulting in weak interactions with ligands.
D. They show strong f-f electronic transitions:
Lanthanoid(III) ions exhibit weak f-f electronic transitions. This is because the f orbitals are well-shielded from external interactions, making it difficult for them to participate in electronic transitions. As a result, the f-f electronic transitions are typically weak in intensity.
In summary, the correct statements are A, B, and C. Lanthanoid(III) ions have weak interactions with ligands due to the shielding effect of the filled 5s and 5p orbitals. They exhibit a large number of possible electronic transitions due to the high spin state resulting from multiple unpaired f electrons. The f orbitals are deeply buried within the electron shell, making them less accessible to external interactions. However, they show weak f-f electronic transitions due to the difficulty in participation of the shielded f orbitals.
A. The metal ion interacts weakly with ligand orbitals:
Lanthanoid(III) ions have a partially filled 4f electron shell, which is shielded by the filled 5s and 5p orbitals. As a result, the 4f orbitals are effectively shielded from the ligand orbitals, leading to weak interactions between the metal ion and the ligands.
B. A large number of microstates result in a large number of transitions:
Lanthanoid(III) ions have a high spin ground state due to the presence of multiple unpaired f electrons. This high spin state leads to a large number of microstates, which in turn results in a large number of possible electronic transitions.
C. The f orbitals are deeply buried:
The f orbitals in lanthanoid(III) ions are located deep within the electron shell, shielded by the filled 5s and 5p orbitals. This deep burial of the f orbitals makes them less accessible to external interactions, resulting in weak interactions with ligands.
D. They show strong f-f electronic transitions:
Lanthanoid(III) ions exhibit weak f-f electronic transitions. This is because the f orbitals are well-shielded from external interactions, making it difficult for them to participate in electronic transitions. As a result, the f-f electronic transitions are typically weak in intensity.
In summary, the correct statements are A, B, and C. Lanthanoid(III) ions have weak interactions with ligands due to the shielding effect of the filled 5s and 5p orbitals. They exhibit a large number of possible electronic transitions due to the high spin state resulting from multiple unpaired f electrons. The f orbitals are deeply buried within the electron shell, making them less accessible to external interactions. However, they show weak f-f electronic transitions due to the difficulty in participation of the shielded f orbitals.
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Of the following statements regarding lanthanoid(III) ions/complexes,A. the metal ion interacts weakly with ligand orbitals.B. a large number of microstates result in large number of transitions.C. the f orbitals are deeply buried.D. they show strong. f-f electronic transitions.the correct statements area)A, C and D onlyb)B, C and D onlyc)A, B and C onlyd)B and C onlyCorrect answer is option 'C'. Can you explain this answer?
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Of the following statements regarding lanthanoid(III) ions/complexes,A. the metal ion interacts weakly with ligand orbitals.B. a large number of microstates result in large number of transitions.C. the f orbitals are deeply buried.D. they show strong. f-f electronic transitions.the correct statements area)A, C and D onlyb)B, C and D onlyc)A, B and C onlyd)B and C onlyCorrect answer is option 'C'. Can you explain this answer? for UGC NET 2024 is part of UGC NET preparation. The Question and answers have been prepared according to the UGC NET exam syllabus. Information about Of the following statements regarding lanthanoid(III) ions/complexes,A. the metal ion interacts weakly with ligand orbitals.B. a large number of microstates result in large number of transitions.C. the f orbitals are deeply buried.D. they show strong. f-f electronic transitions.the correct statements area)A, C and D onlyb)B, C and D onlyc)A, B and C onlyd)B and C onlyCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for UGC NET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Of the following statements regarding lanthanoid(III) ions/complexes,A. the metal ion interacts weakly with ligand orbitals.B. a large number of microstates result in large number of transitions.C. the f orbitals are deeply buried.D. they show strong. f-f electronic transitions.the correct statements area)A, C and D onlyb)B, C and D onlyc)A, B and C onlyd)B and C onlyCorrect answer is option 'C'. Can you explain this answer?.
Of the following statements regarding lanthanoid(III) ions/complexes,A. the metal ion interacts weakly with ligand orbitals.B. a large number of microstates result in large number of transitions.C. the f orbitals are deeply buried.D. they show strong. f-f electronic transitions.the correct statements area)A, C and D onlyb)B, C and D onlyc)A, B and C onlyd)B and C onlyCorrect answer is option 'C'. Can you explain this answer? for UGC NET 2024 is part of UGC NET preparation. The Question and answers have been prepared according to the UGC NET exam syllabus. Information about Of the following statements regarding lanthanoid(III) ions/complexes,A. the metal ion interacts weakly with ligand orbitals.B. a large number of microstates result in large number of transitions.C. the f orbitals are deeply buried.D. they show strong. f-f electronic transitions.the correct statements area)A, C and D onlyb)B, C and D onlyc)A, B and C onlyd)B and C onlyCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for UGC NET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Of the following statements regarding lanthanoid(III) ions/complexes,A. the metal ion interacts weakly with ligand orbitals.B. a large number of microstates result in large number of transitions.C. the f orbitals are deeply buried.D. they show strong. f-f electronic transitions.the correct statements area)A, C and D onlyb)B, C and D onlyc)A, B and C onlyd)B and C onlyCorrect answer is option 'C'. Can you explain this answer?.
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