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Which of the following electronic configurations has a spin-only magnetic moment of 2.82 BM?

1. d5 in a strong ligand field
2. d3 in both weak and strong ligand fields
3. d4 in a weak ligand field
4. d4 in a strong ligand field

Correct answer: d4 in a strong ligand field

Solution

The d4 configuration in a strong ligand field results in a low-spin state with two unpaired electrons, leading to a calculated spin-only magnetic moment of 2.82 BM, which corresponds to the presence of two unpaired spins.

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