Which of the following species is paramagneti | vedclass

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(C) $1$. $K_3[Co(C_2O_4)_3]$ contains $[Co(C_2O_4)_3]^{3-}$. Here,$Co^{3+}$ is in $d^6$ configuration. With strong field ligand $C_2O_4^{2-}$,it is di

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$[NMe_4]O_3$

Vedclass · Answer

(C) $1$. $K_3[Co(C_2O_4)_3]$ contains $[Co(C_2O_4)_3]^{3-}$. Here,$Co^{3+}$ is in $d^6$ configuration. With strong field ligand $C_2O_4^{2-}$,it is diamagnetic.$2$. $NO[PF_6]$ consists of $NO^+$ and $[PF_6]^-$. $NO^+$ has $14$ electrons (isoelectronic with $N_2$),so it is diamagnetic. $[PF_6]^-$ is also diamagnetic.$3$. $[NMe_4]O_3$ consists of $[NMe_4]^+$ and $O_3^-$. The ozonide ion $O_3^-$ has $19$ valence electrons,making it paramagnetic due to an unpaired electron.$4$. $H[BF_4]$ consists of $H^+$ and $[BF_4]^-$. Both are diamagnetic.Thus,$[NMe_4]O_3$ is the paramagnetic species.

Which of the following species is paramagnetic?

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