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What is meant by crystal field splitting energy? On the basis of crystal field theory, write the electronic configuration of `d^(4)` in terms of `t_(2g) and e_(g)` in an octahedral field when (i)`Delta_(0)gtP` (ii) `Delta_(0)ltP` |
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Answer» The splitting energy of the degenerate orbitals due to the. presence of ligands in a definite geometry is known as crystal field splitting and the difference of energy between two sets of degenerate orbitals. (i) If `Delta_(0)gt P,` it becomes more energetically favourable for the fourth electron to occupy as `t_(2g)` orbital with configuration `t_(2g)^(4).e_(g)` Thus ligands for which `Delta_(0)gtP` are known as strong field ligands and form low spin complex. (ii) If `Delta_(0)ltP`, the fourth electron enters one of the `e_(g),` orbital giving the configuration `t_(2g)^(3)e_(g),` Ligands for which `Delta_(0)ltP` are known as weak field ligands and form high spin complexes. |
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