1.

Which of the following carbonyls will have the strongest C-O bond ?

Answer»

`Mn(CO)_(6)^(+)`
`Cr(CO)_(6)`
`V(CO)_(6)^(-)`
`Fe(CO)_(5)`

Solution :As+ vechargeon the CENTRAL metal atom increase, the LESS readily the metal can donate ELECTRON density into the `pi^(**)` orbitals of CO ligand to weaken the C-O bond. Hence, the C-O bond WOULD be STRONGEST in `Mn(CO)_(6)^(+)`.


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