Q. Llimitations of werners theory?
There were inherent limitations with such a simple approach. For example, the following experimental facts cannot be explained on the basis of such a simple model:
- certain metal ions show stronger tendency to form complexes compared to others;
- certain elements can form complexes with different coordination numbers as well as in different oxidation states;
- Some metal ion complexes are very reactive and exchange ligands in typical substitution of reactions whereas others do not.
- a particular geometrical shape appears to be preferred by some ions;
- Most of the transition element complexes show typical sharp colours.