Which of the following ligands does not act a | vedclass

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Question

(C) $\pi$-acid ligand (or $\pi$-acceptor ligand) is a ligand that can accept electron density from the metal atom into its vacant $\pi$ or $\pi^*$ orb

Vedclass · Accepted Answer

$O_2^{2-}$

Vedclass · Answer

(C) $\pi$-acid ligand (or $\pi$-acceptor ligand) is a ligand that can accept electron density from the metal atom into its vacant $\pi$ or $\pi^*$ orbitals.$N_2$,$CO$,and $C_2H_4$ possess vacant $\pi^*$ antibonding molecular orbitals,allowing them to act as $\pi$-acid ligands.However,the peroxide ion $O_2^{2-}$ has a filled $\pi^*$ antibonding molecular orbital and lacks vacant orbitals of appropriate energy to accept electron density from the metal.Therefore,$O_2^{2-}$ does not act as a $\pi$-acid ligand.

Which of the following ligands does not act as a $\pi$-acid ligand?

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