Which of the following cobalt-(III) complex i | vedclass

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(A) The oxidation state of $Co$ in all given complexes is $+3$. The electronic configuration of $Co^{3+}$ is $[Ar] 3d^6$.$1$. In $[Co(CN)_6]^{3-}$,$CN

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

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(A) The oxidation state of $Co$ in all given complexes is $+3$. The electronic configuration of $Co^{3+}$ is $[Ar] 3d^6$.$1$. In $[Co(CN)_6]^{3-}$,$CN^-$ is a strong field ligand,causing pairing of electrons. It forms a low spin $d^2sp^3$ complex which is diamagnetic.$2$. In $[Co(C_2O_4)_3]^{3-}$,$C_2O_4^{2-}$ is a strong field ligand,forming a low spin $d^2sp^3$ complex which is diamagnetic.$3$. In $[Co(H_2O)_6]^{3+}$,$H_2O$ is a weak field ligand. It does not cause pairing of electrons. The configuration remains $t_{2g}^4 e_g^2$,resulting in $4$ unpaired electrons. Thus,it is a high spin paramagnetic complex.

Which of the following cobalt-$(III)$ complex is paramagnetic and high spin complex?

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