Among the following metal carbonyls, the `C-O` bond order is lowest inA. `[Mn(CO)_(6)]^(+)`B. `[Fe(CO)_(5)]`C. `[Cr(CO)_(6)]`D. `[V(CO)_(6)]^(-)`

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

1.	Among the following metal carbonyls, the `C-O` bond order is lowest inA. `[Mn(CO)_(6)]^(+)`B. `[Fe(CO)_(5)]`C. `[Cr(CO)_(6)]`D. `[V(CO)_(6)]^(-)`
Answer» Correct Answer - D An anionic carbonyl complex can delocalise more electron density to antibonding pi orbital of CO and hence lowers the bond order.

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Among the following metal carbonyls, the `C-O` bond order is lowest inA. `[Mn(CO)_(6)]^(+)`B. `[Fe(CO)_(5)]`C. `[Cr(CO)_(6)]`D. `[V(CO)_(6)]^(-)`

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