First slide

Crystal field theory

Question

Based on CFT, the correct relation between $∆_{o} and ∆_{t}$ is

Moderate

A

$∆_{0} = \frac{4}{9} ∆_{t}$
B

$∆_{0} = \frac{3}{8} ∆_{t}$
C

$∆_{t} = \frac{9}{5} ∆_{o}$
D

$∆_{t} = \frac{8}{5} ∆_{o}$

Solution

Crystal field splitting in octahedral complexes is more than in tetrahedral complexes because
I) Six ligands in octahedral complexes but only four ligands in tetrahedral complexes;
II) Ligands approach along the axes in octahedral complexes whereas in between the axes in tetrahedral complexes;
$∆_{0} = \frac{4}{9} ∆_{t};$

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