Which of the following is expected to be a pa | vedclass

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(A) To determine paramagnetism,we check for unpaired electrons in the central metal ion: $1$. In $[Ni(H_2O)_6]^{2+}$,$Ni$ is in the $+2$ oxidation sta

Vedclass · Accepted Answer

$[Ni(H_2O)_6]^{2+}$

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(A) To determine paramagnetism,we check for unpaired electrons in the central metal ion: $1$. In $[Ni(H_2O)_6]^{2+}$,$Ni$ is in the $+2$ oxidation state $(3d^8)$. $H_2O$ is a weak field ligand,so the configuration is $t_{2g}^6 e_g^2$,which has $2$ unpaired electrons. Thus,it is paramagnetic. $2$. In $[Ni(CO)_4]$,$Ni$ is in the $0$ oxidation state $(3d^8 4s^2)$. $CO$ is a strong field ligand,causing pairing to form $3d^{10}$,which is diamagnetic. $3$. In $[Zn(NH_3)_4]^{2+}$,$Zn$ is in the $+2$ oxidation state $(3d^{10})$,which is diamagnetic. $4$. In $[Co(NH_3)_6]^{3+}$,$Co$ is in the $+3$ oxidation state $(3d^6)$. $NH_3$ is a strong field ligand,causing pairing to form $t_{2g}^6 e_g^0$,which is diamagnetic.

List-$I$	List-$II$
$I. [FeF_6]^{3-}$	$A. 1.73 \ BM$
$II. [Ti(H_2O)_6]^{3+}$	$B. 5.93 \ BM$
$III. [Cr(NH_3)_6]^{3+}$	$C. 0.00 \ BM$
$IV. [Ni(H_2O)_6]^{2+}$	$D. 2.83 \ BM$
$V. [Fe(CN)_6]^{4-}$	$E. 3.88 \ BM$

Which of the following is expected to be a paramagnetic complex?

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Match List-$I$ with List-$II$ and select the correct answer using the codes given below:
List-$I$ List-$II$
$I. [FeF_6]^{3-}$ $A. 1.73 \ BM$
$II. [Ti(H_2O)_6]^{3+}$ $B. 5.93 \ BM$
$III. [Cr(NH_3)_6]^{3+}$ $C. 0.00 \ BM$
$IV. [Ni(H_2O)_6]^{2+}$ $D. 2.83 \ BM$
$V. [Fe(CN)_6]^{4-}$ $E. 3.88 \ BM$

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