The lowest value of paramagnetism is shown by

Question

The lowest value of paramagnetism is shown by (A) [Co(CN)6]3- (B) [Fe(CN)6]3- (C) [Cr(CN)6]3- (D) [Mn(CN)6]3-

Tardigrade Admin · Accepted Answer

[ Co ( CN )6]3- ⇒ Co 3+ ⇒ [ Ar ] 3 d 6 ⇒ CN - ⇒ Strong field ligand. Refer to image. No Unpaired electrons. <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/1cd228b2f1b67e68f0ce16b975d3cb7e-.png" />

Q. The lowest value of paramagnetism is shown by

$[C o (CN)_{6}]^{3 -}$

$[F e (CN)_{6}]^{3 -}$

$[C r (CN)_{6}]^{3 -}$

$[M n (CN)_{6}]^{3 -}$

$[C o (CN)_{6}]^{3 -} \Rightarrow C o^{3 +} \Rightarrow [A r] 3 d^{6}$ $\Rightarrow C N^{-} \Rightarrow$ Strong field ligand.
Refer to image.
No Unpaired electrons.

Q. The lowest value of paramagnetism is shown by

[Co(CN)6​]3−

[Fe(CN)6​]3−

[Cr(CN)6​]3−

[Mn(CN)6​]3−

[Co(CN)6​]3−⇒Co3+⇒[Ar]3d6 ⇒CN−⇒ Strong field ligand. Refer to image. No Unpaired electrons.

$[C o (CN)_{6}]^{3 -}$

$[F e (CN)_{6}]^{3 -}$

$[C r (CN)_{6}]^{3 -}$

$[M n (CN)_{6}]^{3 -}$

$[C o (CN)_{6}]^{3 -} \Rightarrow C o^{3 +} \Rightarrow [A r] 3 d^{6}$ $\Rightarrow C N^{-} \Rightarrow$ Strong field ligand.
Refer to image.
No Unpaired electrons.