Question:
Which of the following ion/ions is/are diamagnetic?
Which of the following ion/ions is/are diamagnetic?
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Diamagnetic complexes have no unpaired electrons. Use crystal field theory to determine the spin state based on the ligand field strength.
Updated On: Jan 29, 2026
- [CoF6]3−
- [Co(NH3)6]3+
- [Fe(OH2)6]2+
- [Fe(CN)6]4−
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The Correct Option is B, D
Solution and Explanation
- [CoF6]3−: Paramagnetic due to unpaired electrons in the high-spin configuration.
- [Co(NH3)6]3+: Diamagnetic because NH3 is a strong field ligand, leading to a low-spin configuration with no unpaired electrons.
- [Fe(OH2)6]2+: Paramagnetic due to unpaired electrons.
- [Fe(CN)6]4−: Diamagnetic because CN− is a strong field ligand, leading to a low-spin configuration with no unpaired electrons.
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