What is spectrochemical series? Explain the difference between a weak field ligand and a strong field ligand.
What is spectrochemical series? Explain the difference between a weak field ligand and a strong field ligand.
Solution and Explanation
A spectrochemical series is the arrangement of common ligands in the increasing order of their crystal-field splitting energy. \((CFSE)\) values. The ligands present on the R.H.S of the series are strong field ligands while that on the L.H.S are weak field ligands. Also, strong field ligands cause higher splitting in the d orbitals than weak field ligands.
\( I- < Br - < S 2- < SCN - < Cl -< N3 < F - < OH - < C2O4 2- ∠¼ H2O < NCS - ∠¼ H - < CN - < NH3 < en ∠¼ SO3 2- < NO2 - < phen < CO\)
Top Questions on Coordination Compounds
The Crystal Field Theory (CFT) of coordination compounds is based on the effect of different crystal fields (provided by the ligands taken as point charges) on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangements in strong and weak crystal fields. In tetrahedral coordination entity formation, the d-orbital splitting is smaller as compared to the octahedral entity.
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The Crystal Field Theory (CFT) of coordination compounds is based on the effect of different crystal fields (provided by the ligands taken as point charges) on the degeneracy of d-orbital energies of the central metal atom/ion. The splitting of the d-orbitals provides different electronic arrangements in strong and weak crystal fields. In tetrahedral coordination entity formation, the d-orbital splitting is smaller as compared to the octahedral entity.
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