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in Coordination Chemistry by (47.5k points)
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Define crystal field stabilisation energy. (CFSE).

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It is defined as the energy difference of electronic configurations in the ligand field (ELF) and the isotropic field / barycentre (Eiso

CFSE (ΔE0) = {ELF} – {Eiso

= {[nt2g – (0.4) + neg(0.6)] ∆0 +npP] – n’p P} 

Where, 

nt2g = the number of electrons in t,„ orbital. 

neg = the number of electrons in n orbital 

np = number of electron pairs in the ligand field. 

n’p = number of electron pairs in the iso tropic field.

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