Q33 of 50 Page 124

Why do compounds having similar geometry have different magnetic moment?

Even if two compounds have similar geometry, they may have a different number of unpaired electrons depending on the kind of ligand present. A strong field ligand will cause pairing of electrons while a weak field ligand will not cause pairing. Pairing or not pairing will change the number of unpaired electrons, thereby affecting the magnetic moment.


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31

Explain why [Fe(H2O)6]3+ has magnetic moment value of 5.92 BM whereas

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 32

Arrange following complex ions in increasing order of crystal field splitting

energy (DO) :


[Cr(Cl)6]3–, [Cr(CN)6]3–, [Cr(NH3)6]3+.


 34

CuSO4.5H2O is blue in colour while CuSO4 is colourless. Why?

 35

Name the type of isomerism when ambidentate ligands are attached to central

metal ion. Give two examples of ambidentate ligands.