Question
What are the limitations of VB theory?
✓
Answer
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, $\left[ Fe ( CN )_6\right]^{4-}$ is diamagnetic (low spin) whereas $\left[ Fe ( CN )_6\right]^{4-}$ is paramagnetic (high spin).
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, $\left[ Fe ( CN )_6\right]^{4-}$ is diamagnetic (low spin) whereas $\left[ Fe ( CN )_6\right]^{4-}$ is paramagnetic (high spin).
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Give two examples for
- Very weak acid
- Very weak base
Explain why is ortho nitrophenol more acidic than ortho methoxyphenol?
Why does the bleeding stop by rubbing moist alum?
What happens when acetic anhydride reacts with ethyl alcohol?
Draw the structure of sucrose
How is dacron obtained from ethylene glycol and terephthalic acid?
O – nitro phenol is slightly soluble ¡n water where as P-nitro phenol is more soluble. Cive reason.
Write a note on Frenkel defect.
What is Baeyer’s reagent? Where it is used?