The conditions and consequence that favours the configuration in a metal complex are: [2025]

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Q.
The conditions and consequence that favours the $t_{2 g}^{3} e_{g}^{1}$ configuration in a metal complex are: [2025]

1 weak field ligand, low spin complex

2 strong field ligand, high spin complex

3 weak field ligand, high spin complex

4 strong field ligand, low spin complex

Ans.
(3)

For weak field ligand, $Δ_{o} < P$ , so the fourth electron prefers to overcome the $Δ_{o}$ energy barrier and go to $e_{g}$ , rather than overcoming pairing energy barrier (P) and going to $t_{2 g}$ . Hence, for weak field ligand, configuration splits as $t_{2 g}^{1, 1, 1} e_{g}^{1, 0}$ (high spin complex) in octahedral field. For strong field ligand, $d^{4}$ configuration splits as $t_{2 g}^{2, 1, 1} e_{g}^{0, 0}$ (low spin complex) in octahedral field.

Solution

Q.
The conditions and consequence that favours the $t_{2 g}^{3} e_{g}^{1}$ configuration in a metal complex are: [2025]

1 weak field ligand, low spin complex

2 strong field ligand, high spin complex

3 weak field ligand, high spin complex

4 strong field ligand, low spin complex

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Solution

Q. The conditions and consequence that favours the t2g3eg1 configuration in a metal complex are: [2025]

1 weak field ligand, low spin complex

2 strong field ligand, high spin complex

3 weak field ligand, high spin complex

4 strong field ligand, low spin complex

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Q.
The conditions and consequence that favours the $t_{2 g}^{3} e_{g}^{1}$ configuration in a metal complex are: [2025]