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  4. Correct sequence of CO bond order in given compounds is (P) mathrmFe( mathrmCO)5( mathrmQ) mathrmCO( mathrmR) mathrmH3 mathrm~B arrow mathrmCO( mathrmS)[ mathrmMn( mathrmCO)5]-

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Q. Correct sequence of $CO$ bond order in given compounds is

(P) $\mathrm{Fe}(\mathrm{CO})_5(\mathrm{Q}) \mathrm{CO}(\mathrm{R}) \mathrm{H}_3 \mathrm{~B} \leftarrow \mathrm{CO}(\mathrm{S})\left[\mathrm{Mn}(\mathrm{CO})_5\right]^{-}$

NTA AbhyasNTA Abhyas 2020Coordination Compounds

Solution:

$\left(Q\right)$

$:\overset{-}{C}\equiv \overset{+}{O}:B.O. \, =3$

$\left(P\right) \, \&\left(S\right)$

$M\rightleftarrows C=O \, B.O.=2$

$\left(R\right)$

$H_{3}\overset{-}{B}\leftarrow C\equiv \overset{+}{O} \, B.O.=3$