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Sagot :
There are four unpaired electrons present in the complex ion [tex][CoBr_6]^3^-[/tex]
What is Crystal Field Theory (CFT)?
- CFT explains the breaking of orbital degeneracy in the transition metal complexes because of the presence of the ligands.
- It describes the strength of the metal-ligand bonds
- There are two types of ligands - weak field ligands and strong field ligands
- Weak field ligands form high spin complexes and strong field ligands form low spin complexes
- High spin complexes have more number of unpaired electrons
- Low spin complexes have less or zero unpaired electrons
A complex ion [tex][CoBr_6]^3^-[/tex] is an octahedral complex. Co is the central atom to which 6 Br atoms are attached. Br is a weak field ligand and forms a high spin complex.
Electronic configuration of Co - [tex][Ar] 3d^7 4s^2[/tex]
Electronic configuration of [tex]Co^3^+ \rightarrow [Ar] 3d^6[/tex]
Electronic configuration of [tex][CoBr_6]^3^-\\[/tex] - [tex]t_2_g^4 e_g^2[/tex]
Hence, there are 4 unpaired electrons present in the complex ion [tex][CoBr_6]^3^-[/tex] .
Learn more about Crystal Field Theory (CFT):
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