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Which of the following cannot be explained by crystal field theory? (1) Stability of metal complexes (2) The order of spectrochemical series (3) Magnetic properties of transition metal complexes (4) Colour of metal complexes

1. Stability of metal complexes
2. The order of spectrochemical series
3. Magnetic properties of transition metal complexes
4. Colour of metal complexes

Correct answer: The order of spectrochemical series

Solution

Crystal field theory primarily focuses on the interactions between metal ions and ligands, explaining stability, magnetic properties, and color of complexes. However, the order of the spectrochemical series is based on empirical observations and does not have a direct theoretical basis within crystal field theory.

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