Coordination Compounds

Identify the homoleptic complex(es) that is/are low spin. Choose the correct answer from the options given below :

1. C and D only
2. C only
3. A and C only
4. B and E only

Answer

(1) C and D only

Solution

Homoleptic = one kind of ligand ⇒ A is out (CN- and NO).

B: Co3+ d6, weak F- ⇒ B is high spin

C: Fe2+ d6, strong CN- ⇒ C is low spin (t2g6)

D: Co3+ d6, strong NH3 ⇒ D is low spin (t2g6)

E: Cr2+ d4, weak H2O ⇒ E is high spin

∴ C and D only

Answer: (1)