Question

For the complex ion $\mathrm{Fe}{\left[{\left(\mathrm{CN}\right)}_6\right]}^{-3}$state its magnetic behavior.

Answer 1

Magnetic behavior:

1. The presence or absence of a lone pair influences magnetic behavior.
2. It is called paramagnetic if there are lone pairs of electrons present, and diamagnetic if there are no lone pairs of electrons present.
3. The electronic configuration of$\mathrm{Fe}$$=4{\mathrm{s}}^2,3{\mathrm{d}}^6$, therefore,${\mathrm{Fe}}^{+3}=3{\mathrm{d}}^5$.
4. It has one unpaired electron after pairing, making it a paramagnetic complex.

Therefore, $\mathrm{Fe}{\left[{\left(\mathrm{CN}\right)}_6\right]}^{-3}$ is a paramagnetic complex.