Which of the following is paramagnetic?

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Question

(D) In $[Ni(CO)_4]$,the oxidation state of $Ni$ is $0$ and it has a $d^{10}$ configuration. Since $CO$ is a strong field ligand,all electrons are pair

Vedclass · Accepted Answer

$[NiCl_4]^{2-}$

Vedclass · Answer

(D) In $[Ni(CO)_4]$,the oxidation state of $Ni$ is $0$ and it has a $d^{10}$ configuration. Since $CO$ is a strong field ligand,all electrons are paired,making it diamagnetic.In $[Co(NH_3)_6]^{3+}$,$Co$ is in $+3$ oxidation state $(d^6)$. $NH_3$ is a strong field ligand,causing pairing of electrons,making it diamagnetic.In $[Ni(CN)_4]^{2-}$,$Ni$ is in $+2$ oxidation state $(d^8)$. $CN^-$ is a strong field ligand,causing pairing of electrons,making it diamagnetic.In $[NiCl_4]^{2-}$,$Ni$ is in $+2$ oxidation state $(d^8)$. $Cl^-$ is a weak field ligand and cannot cause pairing of electrons. Therefore,it has $2$ unpaired electrons,making it paramagnetic.

Similar Questions

The complexes $[Co(NH_3)_6][Cr(C_2O_4)_3]$ and $[Cr(NH_3)_6][Co(C_2O_4)_3]$ exhibit which type of isomerism?

Which of the following exhibits optical isomerism?

Which of the following complexes will show coordination isomerism?
$A. [Ag(NH_3)_2][Ag(CN)_2]$
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$C. [Co(NH_3)_6][Co(CN)_6]$
$D. [Fe(NH_3)_6][Co(CN)_6]$
$E. [Co(NH_3)_6][Fe(CN)_6]$
Choose the correct answer from the options given below:

The calculated magnetic moments (spin only value) for species $[FeCl_{4}]^{2-}$,$[Co(C_{2}O_{4})_{3}]^{3-}$ and $MnO_{4}^{2-}$ respectively are ..... .

The spin-only magnetic moment value for the complex $[Co(CN)_6]^{4-}$ is $...... \ BM$ [At. no. of $Co=27$]

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