Question

The complex ${\left[Mn{\left(CN\right)}_6\right]}^{4-}$ :

• A. is high spin complex
• B. is diamagnetic ion
• C. have magnetic moment 1.73 BM
• D. is outer orbital complex

Answer 1

Answer: (C)

have magnetic moment 1.73 BM

Option (A) is correct.
The complex ${\left[Mn{\left(CN\right)}_6\right]}^{4-}$ is Having magnetic moment 1.73 BM It is low spin complex, paraamagnetic ion and inner orbital complex.
The magnetic moment $\left(\mu \right)$ of $Mn$ is $1.73BM$.In this complex $Ni$ has $d^5$ orbitals and has 1 unpaired electrons.
$\left(\mu \right)$ = $\sqrt{n(n+2)}$
= $\sqrt{1(1+2)}$
= $1.73BM$