The magnetic moment of an octahedral homoleptic Mn ( II ) complex is 5 .9   B . M . . The suitable…

The magnetic moment of an octahedral homoleptic Mn(II) complex is 5.9 B.M. . The suitable ligand for this complex is:
  1. CN-
  2. CO
  3. Ethylenediamine
  4. NCS-

Solution

Mn2+ will have configuration =3d54s0

μ=5.93=nn+2

or, n=5 as 35=5.93

If has 5 unpaired electron which are not getting paired up. This implies that the ligand paired up, and the ligand is a weak field ligand. Among the given options, weak ligand is NCS-

Asked in: JEE Main 2019 (12 Jan Shift 2)

Practice more Coordination Compounds questions on Aicharya