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Among the following metal carbonyls, the...

Among the following metal carbonyls, the C–O bond order is lowest in

A

`[Mn(CO)_6]^(+)`

B

`[Fe(CO)_5]`

C

`[Cr(CO)_6]`

D

`[V(CO)_6]^(-)`

Text Solution

Verified by Experts

The correct Answer is:
D
An anionic carbonyl complex can delocalise more electron density to antibonding `pi`-orbital (`d pi - p pi` back bonding) of `CO ` and thus lowers the bond order.
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