MediumNEET TEST
+4 / -1
The pair in which both species have the same magnetic moment (spin-only value) is:
A
[Fe(H2O)6]3+ and [Mn(H2O)6]2+
B
[Co(H2O)6]2+ and [Ni(H2O)6]2+
C
[Cr(H2O)6]3+ and [Fe(H2O)6]2+
D
[Mn(H2O)6]2+ and [Fe(CN)6]4–
Explanation
Fe3+ is 3d5 and Mn2+ is also 3d5. With H2O as a weak-field ligand, both octahedral complexes are high spin and contain five unpaired electrons each, so their spin-only magnetic moments are equal.
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