The magnitude of CFSE (Crystal Field Splitting Energy, Δo) can be related to the configuration of d-orbitals in a coordination entity as

Question

The magnitude of CFSE (Crystal Field Splitting Energy, Δo) can be related to the configuration of d-orbitals in a coordination entity as (A) if Δo < P, the configuration is t32g e1g= weak field ligand and high spin complex (B) if Δo > P, the configuration is t32g e1g= strong field ligand and low spin complex (C) if Δo > P, the configuration is t4 2g e0g= strong field ligand and high spin complex (D) if Δo = P, the configuration is t42g e0g= strong field ligand and high spin complex

Tardigrade Admin · Accepted Answer

If CFSE (Δ0)< P (Energy required for pairing), the electrons do not pair up and fourth electron goes to eg of higher energy. Hence, high spin complex is formed. Pairing of electrons does not take place in case of weak field ligands.

Q. The magnitude of $CFSE$ (Crystal Field Splitting Energy, $Δ_{o}$ ) can be related to the configuration of $d$ -orbitals in a coordination entity as

if $Δ_{o} < P$ , the configuration is $t_{2 g}^{3} e_{g}^{1} =$ weak field ligand and high spin complex

if $Δ_{o} > P$ , the configuration is $t_{2 g}^{3} e_{g}^{1} =$ strong field ligand and low spin complex

if $Δ_{o} > P$ , the configuration is $t_{2 g}^{4} e_{g}^{0} =$ strong field ligand and high spin complex

if $Δ_{o} = P$ , the configuration is $t_{2 g}^{4} e_{g}^{0} =$ strong field ligand and high spin complex

If $CFSE (Δ_{0}) < P$ (Energy required for pairing), the electrons do not pair up and fourth electron goes to $e_{g}$ of higher energy. Hence, high spin complex is formed. Pairing of electrons does not take place in case of weak field ligands.

Q. The magnitude of CFSE (Crystal Field Splitting Energy, Δo​) can be related to the configuration of d-orbitals in a coordination entity as

if Δo​<P, the configuration is t2g3​eg1​= weak field ligand and high spin complex

if Δo​>P, the configuration is t2g3​eg1​= strong field ligand and low spin complex

if Δo​>P, the configuration is t2g4​eg0​= strong field ligand and high spin complex

if Δo​=P, the configuration is t2g4​eg0​= strong field ligand and high spin complex

If CFSE(Δ0​)<P (Energy required for pairing), the electrons do not pair up and fourth electron goes to eg​ of higher energy. Hence, high spin complex is formed. Pairing of electrons does not take place in case of weak field ligands.