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Coordination Complexes

In the isoele...

Question

In the isoelectronic series of metal carbonyl, The CO bond strength is expected to increase in the order:

A

$(M n (C O)_{6})^{+} < (C r (C O)_{6}) < (V (C O)_{6})^{-}$

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B

$(V (C O)_{6})^{-} < (C r (C O)_{6}) < (M n (C O)_{6})^{+}$

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C

$(V (C O)_{6})^{-} < (M n (C O)_{6})^{+} < (C r (C O)_{6})$

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D

$(C r (C O)_{6}) < (M n (C O)_{6})^{+} < (V (C O)_{6})^{-}$

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Solution

The correct option is B
$(V (C O)_{6})^{-} < (C r (C O)_{6}) < (M n (C O)_{6})^{+}$

CO bond strength is reciprocal to the extent of back donation involved in synergic bonding
(ie) M $⇌$ CO

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Similar questions

Q. Among the metal carbonyls

[M n (C O)_{6}]^{+}, [T i (C O)_{6}], [C r (C O)_{6}]

[V (C O)_{6}]^{-}

C - O

bond order would be lowest in :

Q. Consider the following complexes

[V (C O)_{6}]^{-}, [C r (C O)_{6}]

[M n (C O)_{6}]^{+}

. Then incorrect statement(s) about metal carbonyls is /are

I R

stretchin frequencies of free

C O

C O

[V (C O)_{6}]^{-}, [C r (C O)_{6}]^{-}

[M n (C O)_{6}]^{-}

2143 c m^{- 1}, 1860 c m^{- 1}, 2000 c m^{- 1}

2090 c m^{- 1}

, respectively. Then correct statement about metal carbonyls is?

Q. In which complex is the

C - O

bond length maximum?

Q. Which amongst the following metal carbonyls are inner orbital complexes with diamagnetic property?
(I)

N i (C O)_{4}

F e (C O)_{5}

V (C O)_{6}

C r (C O)_{6}

Select the correct answer from the codes gives below:

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