Question

Crystal field splitting energey `(CFSE)` for the complex `[Fe(O)_(4)]^(2-)` is when `Delta =125` and ` P =250kJmo1^(-1)` .
A. `-1.2Delta_(t)`
B. `1.2Delta_(t)`
C. `-8`
D. 8

Answer 1

Correct Answer - a
Tetrahedral complex `CN =4, Delta ltP`
Weak ligand no pairing high spin
`Fe = 3d^(6)4s^(2)` , `Fe^(+6) = 3d^(2)implies (e^(2) t_(2)^(0))`
`CFSE = ( -0.6 xx 2)Delta_(t) = - 1.2Delta_(t)` .