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Polarity and Dipole Moments

In compound [...

Question

In compound $[M (C O)_{n}]^{z}$ , the correct match for highest $^{'} M - C^{'}$ bond length for given M, n and z respectively :

A

M = M n; n = 6; z = + 1

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B

M = C r; n = 6; z = 0

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C

M = T i; n = 6; z = - 2

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D

M = V; n = 6; z = - 1

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Solution

The correct option is A $M = M n; n = 6; z = + 1$
In metal carbonyls, the bond order of $M - C$ increases and $C - O$ decreases.

Metals with high oxidation state shows least back bonding as they have least tendency to donate. And the $M - C$ bond order will be lowest. So its bond length will be highest.

metal has highest oxidation state in option d,
$M = M n; n = 6; z = + 1$

Thus, option (d) is correct.

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