Answer:
A. One unpaired electron
B. 5 unpaired electrons
Explanation:
In A ,Fe is in +3 oxidation state and Electronic configuration- [Ar]3d5
And NO2 is a strong field ligand hence it causes pairing in t2g orbitals and results one unpaired electron in dZX orbital.
In B, also Fe is in +3 oxidation state but F is weak field ligand hence causes no pairing of Electrons hence it results 5 unpaired electrons with electronic configuration t2g^3 eg^2
The number of unpaired electrons that are expected for [tex][Fe(NO_2)_6]_3[/tex] is equal to one (1).
Crystal field theory (CFT) can be defined as a model that describes the breaking of orbital degeneracy of an electron or bonding interaction in transition metals due to the presence of ligands.
For [tex][Fe(NO_2)_6]_3[/tex]:
The oxidation state of iron (Fe) is +3 and its electronic configuration is given by [tex][Ar]_3d_5[/tex]. Also, [tex]NO_2[/tex] represents a strong field ligand and as such it has one (1) unpaired electron in the [tex]d_{ZX}[/tex] orbital.
For [tex][FeF_6]_3[/tex]:
The oxidation state of iron (Fe) is +3 and its electronic configuration is given by [tex][Ar]_3d_5[/tex]. Also, [tex]F[/tex] represents a weak field ligand and as such it has five (5) unpaired electron.
Read more on electrons here: brainly.com/question/377844
