Tamilnadu BoardEnglish MediumSTD 12ChemistryCoordination Chemistry2 Marks
Question
What is crystal field stabilization energy (CFSE)?
✓
Answer
The crystal field stabilisation energy is defined as the energy difference of electronic configurations in the ligand field ( $E_{L F}$ ) and the isotropic field ( $E _{\text {iso }}$ ).
$\operatorname{CFSE}\left(\Delta E_0\right)=\left(E_{L F)}-\left(E_{\text {iso }}\right)\right.$
$=\left(n_{\text {t2g }}(-0.4)+n_{\text {eg }}(0.6) \Delta_0-n_p P\right)-\left(n_p^{\prime} P\right)$
Here $n _{ tg }$ is the number of electrons in t-orbitals
$n _{ eg }$ is the number of electrons in e-orbitals
$n_p$ is the number of electrons in the ligand field
$n_p^{\prime}$ is the number of electrons in the isotropic field
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.