Which are the dissimilarities between CO and | vedclass

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(D) In metal carbonyls and metal phosphine complexes,both $CO$ and $PF_3$ act as $\sigma$-donors and $\pi$-acceptors.$CO$ accepts electron density fro

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$CO$ accepts back donation into its $\pi^*$ orbital while $PF_3$ accepts back donation into its $3d$ orbital in a complex

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(D) In metal carbonyls and metal phosphine complexes,both $CO$ and $PF_3$ act as $\sigma$-donors and $\pi$-acceptors.$CO$ accepts electron density from the metal into its empty antibonding $\pi^*$ molecular orbital.$PF_3$ accepts electron density from the metal into its empty $3d$ orbitals (or $\sigma^*$ orbitals depending on the model).Option $A$ is incorrect because $CO$ is not a $\pi$-donor.Option $B$ is incorrect as both can be toxic.Option $C$ is a physical property difference,but the primary chemical distinction in coordination chemistry is the nature of the $\pi$-acceptor orbital.Option $D$ correctly identifies the difference in the acceptor orbitals involved in back-bonding.

Which are the dissimilarities between $CO$ and $PF_3$?

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