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Correct sequence of CO bond order in giv...

Correct sequence of CO bond order in given compounds is:
(P) `Fe(CO)_(5)`
(Q) `CO`
(R) `H_(3) B larr CO`
(S) `[Mn(CO)_(5)]^(-)`

A

`P gt R gt S gt Q`

B

SgtPgtRgtQ

C

QgtSgtPgtR

D

RgtQgtPgtS

Text Solution

Verified by Experts

The correct Answer is:
B
CO bond order`prop(1)/("Extent of back bonding "(Mto CO))`
Correct sequence of CO bond order:
`underset(("CO bond order "gt3.0))(H_(3)B larr CO) gt underset(B.O.=3.0)(CO) gt underset(("CO bond order " lt 3.0))(Fe(CO)_(5)) gt underset(("CO bond order "lt 3.0))([Mg(CO)_(5)]^(-))`
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