The bond length of the C-O bond in carbon mon | vedclass

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Question

(A) In $Fe(CO)_5$,there exists a synergic bond between $Fe$ and $CO$.
Due to the back-donation of electrons from the metal $d$-orbitals into the anti

Vedclass · Accepted Answer

$1.158$

Vedclass · Answer

(A) In $Fe(CO)_5$,there exists a synergic bond between $Fe$ and $CO$.
Due to the back-donation of electrons from the metal $d$-orbitals into the antibonding $\pi^*$ orbitals of $CO$,the bond order of the $C-O$ bond decreases.
As the bond order decreases,the bond length increases compared to free $CO$ $(1.128 \ \mathring{A})$.
Among the given options,the only value greater than $1.128 \ \mathring{A}$ is $1.158 \ \mathring{A}$.
Therefore,option $A$ is the correct answer.

The bond length of the $C-O$ bond in carbon monoxide is $1.128 \ \mathring{A}$. The $C-O$ bond length in $Fe(CO)_5$ is ............. $\mathring{A}$.

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