Chemical Bonding and Molecular Structure - Result Question 112

####115. The correct order of CO bond length among CO,CO32,CO2 is

[2007]

(a) CO<CO32<CO2

(b) CO32<CO2<CO

(c) CO<CO2<CO32

(d) CO2<CO32<CO

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Solution:

  1. (c) All these structures exhibits resonance and can be represented by the following resonating structures.
$
\begin{equation*}
\overline{C} \equiv \stackrel{+}{O}: \longleftrightarrow: C=\ddot{O}: \tag{i} \end{equation*} $

More is the single bond character. More will be the bond length. Hence, the corret order is :

CO<CO2<CO32



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