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Coordination Compounds

Question
CBSEENCH12011279
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Crystal field stabilisation energy for high spin d4 octahedral complex is

  • -1.8 Δo

  • -1.6 Δo + P

  • -1.2 Δo

  • -0.6 Δo

Solution

D.

-0.6 Δo

In the case of high spin complex Δo  is small. Thus, the energy required to pair up the fourth electron with the electrons of lower energy d- orbitals would be higher than that required to place the electrons in the higher d -orbital. Thus pairing does not occur.
For high spin d4 octahedral complex,

therefore, 
Crystal field stabilisation energy
= (-3 x 0.4 +1 x 0.6) Δo
= - (-1.2 x 0.6 )Δo
=-0.6 Δo

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