1.

Which of the following has longest C-O bond length ? (Free bond length in CO is 1.128 Å)

Answer»

`[Fe(CO)_(4)]^(2-)`
`[Mn(CO)_(6)]^(+)`
`Ni(CO)_(4)`
`[Co(CO)_(4)]^(-)`

Solution :The greater the negative charge on the carbonyl complex, the easier it would be for the metal to allow its electrons to PARTICIPATE in the back bonding. As a result, higher would be the M-C BOND order and simultaneously, there would be greater reduction in the C-O bond order and HENCE larger bond length. Thus, `[Fe(CO)_(4)]^(2-)` has the lowest C-O bond order and, therefore, the longest bond length.


Discussion

No Comment Found

Related InterviewSolutions