Match the LIST-I with LIST-II
- A-III, B-IV, C-II, D-I
- A-III, B-I, C-IV, D-II
- A-III, B-IV, C-I, D-II
- A-II, B-I, C-IV, D-III
Answer
(3) A-III, B-IV, C-I, D-II
Solution
Tetrahedral field: e set (lower, −0.6 t per electron) and t2 set (higher, +0.4 t per electron)
∵ t is small ( t < P) ⇒ high-spin filling
CFSE = (-0.6 ne + 0.4 nt2) t
A. d2: e2t20 ⇒ −1.2 t ⇒ III
B. d4: e2t22 ⇒ −1.2 + 0.8 = −0.4 t ⇒ IV
C. d6: e3t23 ⇒ −1.8 + 1.2 = −0.6 t ⇒ I
D. d8: e4t24 ⇒ −2.4 + 1.6 = −0.8 t ⇒ II
∴ A-III, B-IV, C-I, D-II
Answer: (3)