JEE Main 2025 Chemistry question
The number of unpaired electrons responsible for the paramagnetic nature of the following complex species are respectively: [Fe(CN)₆]³⁻, [FeF₆]³⁻, [CoF₆]³⁻, [Mn(CN)₆]³⁻
Answer: (1)
Solution
[Fe(CN)₆]³⁻: Fe³⁺, d⁵, low spin, 1 unpaired e⁻. [FeF₆]³⁻: Fe³⁺, d⁵, high spin, 5 unpaired e⁻.
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