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Which of the following has longest C-O b...

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

A

`Ni(CO)_4`

B

`[Co(CO)_4]^Theta`

C

`[Fe(CO)_4]^(2-)`

D

`[Mn(CO)_6]^+`

Text Solution

Verified by Experts

The correct Answer is:
C
Since metal atom is carrying maximum –ve charge therefore it would show maximum synergic bonding as resultant C – O bond length would be maximum.
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