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The d & f Block Elements — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryThe d & f Block Elements3 Marks
Question
Giving a suitable example for each, explain the following:
  1. Crystal field splitting.
  2. Linkage isomerism.
  3. Ambidentate ligand.
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Answer

  1. Crystal field splitting: The splitting of d-orbitals under the influence of approaching ligand is known as crystal field splitting eg for $d^4$, configuration is $t_{2g}{}^3e_g{}^1$ in the presence of weak field ligand.
  2. Linkage isomerism: Linkage isomers are those isomers which have same molecular formula but differ in the linkage of ligand atom to the central atom e.g.
$[Co(NH_3)_5 NO_2]Cl_2, [Co(NH_3)_5 ONO]Cl_2$.
  1. Ambident ligand: a un identate ligand which can co-ordinate to the central metal atom through more than one co-ordinating bond.e.g. $NO_2{}^–, SCN^–$.

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