Which of the following outer octahedral compl | vedclass

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(A) The complexes are octahedral and involve weak field ligands,resulting in high spin (outer orbital) complexes.$1$. $[MnCl_6]^{3-}$: $Mn^{3+}$ is $d

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$1$ and $3$

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(A) The complexes are octahedral and involve weak field ligands,resulting in high spin (outer orbital) complexes.$1$. $[MnCl_6]^{3-}$: $Mn^{3+}$ is $d^4$. With weak field ligands,all $4$ electrons remain unpaired $(n = 4)$.$2$. $[FeF_6]^{3-}$: $Fe^{3+}$ is $d^5$. With weak field ligands,all $5$ electrons remain unpaired $(n = 5)$.$3$. $[CoF_6]^{3-}$: $Co^{3+}$ is $d^6$. With weak field ligands,the configuration is $t_{2g}^4 e_g^2$,resulting in $4$ unpaired electrons $(n = 4)$.$4$. $[Ni(NH_3)_6]^{2+}$: $Ni^{2+}$ is $d^8$. The configuration is $t_{2g}^6 e_g^2$,resulting in $2$ unpaired electrons $(n = 2)$.Thus,complexes $1$ and $3$ have the same number of unpaired electrons $(n = 4)$.

Which of the following outer octahedral complexes have the same number of unpaired electrons?
$1$. $[MnCl_6]^{3-}$
$2$. $[FeF_6]^{3-}$
$3$. $[CoF_6]^{3-}$
$4$. $[Ni(NH_3)_6]^{2+}$

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Which of the following outer octahedral complexes have the same number of unpaired electrons?$1$. $[MnCl_6]^{3-}$$2$. $[FeF_6]^{3-}$$3$. $[CoF_6]^{3-}$$4$. $[Ni(NH_3)_6]^{2+}$