In metal carbonyls,the metal-carbon bond poss | vedclass

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(C) In metal carbonyls,the metal-carbon bond possesses both $\sigma$ and $\pi$ character. The $M-C$ $\sigma$-bond is formed by the donation of a lone

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Both $\sigma$ and $\pi$-bond (back-donation) between the metal atom and the $CO$ molecule.

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(C) In metal carbonyls,the metal-carbon bond possesses both $\sigma$ and $\pi$ character. The $M-C$ $\sigma$-bond is formed by the donation of a lone pair of electrons from the carbonyl carbon into a vacant orbital of the metal. The $M-C$ $\pi$-bond is formed by the back-donation of a pair of electrons from a filled $d$-orbital of the metal into the vacant antibonding $\pi^*$ orbital of carbon monoxide.

In metal carbonyls,the metal-carbon bond possesses:

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