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What are the limitations of VB theory? |
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Answer» Solution :Limitations of VB theory (i) It doesnot explainthe colour of thecomplex. (ii) It considersthe spin only magnetic momentsand does not considerthe othercomponentsof magneticmoments. (iii)it does not providea quantitativeexplanationas to whycertainas to why certaincomplexes are innerorbitalcomplexesand theotherare outerorbitalcomplexesfor thesame metal. For EXAMPLE, ` [Fe(CN)_(6)]^(4-)` is diamagnetic ( lowspin )whereas ` [FeF_(6)]^(4-)`is paramagntic (high spin). |
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