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What are the limitation of VB theory ? |
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Answer» Solution :Limitations of VB -THEORY : `1`. It does not explain the colour of the complex. `2`. It considers only the SPIN only magnetic MOMENTS and does not consider the other components of magnetic moments. `3`. It does not provide a quantitative explanation as to why certain complexes are inner orbital complexes and the others are outer orbital complexes for the same metal. For example, `[Fe(CN)_(6)]^(4-)` is diamagnetic (low spin) whereas `[FeF_(6)]^(4-)` is paramagnetic (high spin). |
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