Select the correct M-C bond order. | vedclass

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(B) In metal carbonyls,the extent of back-bonding from the metal to the $CO$ ligand depends on the electron density on the metal atom.As the negative

Vedclass · Accepted Answer

$[Ni(CO)_4] < [Co(CO)_4]^- < [Fe(CO)_4]^{2-}$

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(B) In metal carbonyls,the extent of back-bonding from the metal to the $CO$ ligand depends on the electron density on the metal atom.As the negative charge on the complex increases,the electron density on the metal increases,which enhances the back-donation of electrons into the $\pi^*$ antibonding orbitals of $CO$.This increases the $M-C$ bond order and decreases the $C-O$ bond order.Therefore,the order of $M-C$ bond order is $[Ni(CO)_4] < [Co(CO)_4]^- < [Fe(CO)_4]^{2-}$.

Select the correct $M-C$ bond order.

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