Question

The magnetic moment of an octahedral homoleptic Mn(II) complex is $5.9\, BM$. The suitable ligand for this complex is :

• A. $CN^-$
• B. $NCS^-$
• C. $CO$
• D. ethylenediamine

Answer 1

Answer: (B)

$NCS^-$

Answer 2

$\mu = 5.9 BM \, \therefore\, n$ (no of unpaired.e-) = 5 Cation $Mn^{II} - 3d^{5}$ confn only possible for relatively weak ligand. $\therefore$ $NCS^-$