JEE Advanced2015ChemistryCoordination CompoundsActual
For the octahedral complexes of F e 3 + in S C N - (thiocyanato-S) and in C N - ligand environments, the difference between the spin-only magnetic moments in Bohr magnetons (when approximated to the nearest integer) is [Atomic number of Fe = 26]
Correct answer
0
Step-by-step solution
S C N - is weak field effect (WFE) ligand whereas C N - is strong field effect (SFE) ligand. Spin only magnetic moment = 5 ( 5 + 2 ) = 35 B M Spin only magnetic moment = 1 ( 1 + 2 ) = 3 B M Difference = 35 - 3 ≃ 4