Question

The valence bond structure of carbon monoxide is best described as :c=a with a dative bond from oxygen atom to the less electronegative carbon atom.
If true enter 1 else 0.

Answer 1

Hint: A dative bond which is also known as coordinate covalent bond is basically a kind of 2- center, 2-electron covalent bond in which the two electrons are derived from the same atom. Moreover, the bonding of metal ions to ligands involves this kind of interaction.

Complete step by step answer:
Basically, the valence bond theory was developed in order to explain chemical bonding using the method of quantum mechanics. This theory focuses on the formation of individual bonds from the atomic orbitals of the participating atoms during the formation of a molecule. Further, this theory also focuses on the concepts of electronic configuration, atomic orbitals and the hybridization of these atomic orbitals.
Now, the above given statement is true. So, let’s see how this statement is correct. Basically, the electronic configuration of C is:
 $1{s^2}2{s^2}2{p^2}$
Now, consider the formation of two s-p hybrid orbitals with one directed towards oxygen and other directed ${180^\circ }$ opposite. So, this contains a carbon lone pair and thus leaving the empty s-p hybrid orbital with a filled oxygen $\sigma $ orbital. To complete the octet, C forms a pi bond and a dative bond.
Hence, it’s true that the valence bond structure of carbon monoxide is best described as : c=0 with a dative bond from oxygen atom to the less electronegative carbon atom.

Note: There were some limitations of valence bond theory. This theory failed to explain the tetravalency exhibited by carbon. Further, it does not give a quantitative interpretation of the thermodynamic or kinetic stabilities of coordination compounds.