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(B) To determine the number of unpaired electrons,we analyze the electronic configuration of the central metal ion in each complex:$1$. In $[Cr(NH_3)_

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$[Co(H_2O)_6]^{3+}$

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(B) To determine the number of unpaired electrons,we analyze the electronic configuration of the central metal ion in each complex:$1$. In $[Cr(NH_3)_6]^{3+}$,$Cr$ is in the $+3$ oxidation state. The configuration of $Cr^{3+}$ is $[Ar]3d^3$. Since $NH_3$ is a strong field ligand,but $d^3$ configuration has no choice but to have $3$ unpaired electrons in the $t_{2g}$ orbitals.$2$. In $[Co(H_2O)_6]^{3+}$,$Co$ is in the $+3$ oxidation state. The configuration of $Co^{3+}$ is $[Ar]3d^6$. $H_2O$ is a weak field ligand,so the electrons remain unpaired in the $t_{2g}$ and $e_g$ orbitals,resulting in $4$ unpaired electrons.$3$. In $[Zn(H_2O)_4]^{2+}$,$Zn$ is in the $+2$ oxidation state. The configuration of $Zn^{2+}$ is $[Ar]3d^{10}$. There are $0$ unpaired electrons.$4$. In $[Ni(CN)_4]^{2-}$,$Ni$ is in the $+2$ oxidation state. The configuration of $Ni^{2+}$ is $[Ar]3d^8$. $CN^-$ is a strong field ligand,causing pairing of electrons,resulting in $0$ unpaired electrons.Comparing the values,$[Co(H_2O)_6]^{3+}$ has the maximum number of unpaired electrons $(4)$.

In which of the following compounds does the central metal atom have the maximum number of unpaired $e^-$?

Similar Questions

Total number of unpaired electrons in the complex ions $[Co(NH_3)_6]^{3+}$ and $[NiCl_4]^{2-}$ is...............

Identify the complex compound$(s)$ which is/are optically active and whose optical activity does not depend upon the orientation of the ligands around the metal cation:
$(i). [CoCl_3(NH_3)_3]$
$(ii). [Co(en)_3]Cl_3$
$(iii). [Co(C_2O_4)_2(NH_3)_2]^-$
$(iv). [CrCl_2(NH_3)_2(en)]^+$

Explain why $[Fe(H_{2}O)_{6}]^{3+}$ has a magnetic moment value of $5.92 \ BM$ whereas $[Fe(CN)_{6}]^{3-}$ has a value of only $1.74 \ BM$.

Which of the following will have a spin-only magnetic moment of $2.86 \ BM$?

In an octahedral complex $[Mabcdef]$,the total number of theoretical isomers is:

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