STANDARD Chemistry Crystal Field Theory MCQ Question
Consider that a d⁶ metal ion (M²⁺) forms a complex with aqua ligands, and the spin only magnetic moment of the complex is 4.90 BM. The geometry and the crystal field stabilisation energy of the complex is
octahedral and – 2.4 Δ₀ + 2P
tetrahedral and – 0.6 Δ₀
octahedral and – 1.6 Δ₀
tetrahedral and – 1.6 Δₜ + 1P
Correct Answer
Detailed Explanation
The spin only magnetic moment of 4.90 B.M. indicates four unpaired electrons, suggesting a tetrahedral geometry. The CFSE for a tetrahedral complex is –0.6 Δ₀.
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