Chapter 8.3, Problem 40PP

Interpretation Introduction

Interpretation:

The structure of carbon disulfide needs to be drawn.

Concept introduction:

Lewis structure can be shown by each atom in the molecule using the chemical symbol with the electrons. The bond is formed by sharing of valence electrons between the atoms and excess electron is shown as lone pair.

Answer to Problem 40PP

Explanation of Solution

A molecule of carbon disulfide contains the lone pair on S atom and double bond between C and S atoms.

Lewis structure of ${\text{CS}}_{\text{2}}$

First write the electron configuration of carbon and sulphur:

Carbon ${\text{1s}}^{2}2s^{2}2p^2$

Sulphur ${\text{1s}}^{2}2s^{2}2p^{6}3s^{2}3p^4$

Carbon has $4$ valence electrons in their outermost shell and sulphur has $6$ valence electrons.

In the valence shell configuration, carbon requires $4$ electrons and sulphur requires $2$ electrons to complete their octet configuration. It is only possible by forming the multiple bonds between the atoms.

Thus, the structure will be:

Conclusion

The valence shell configuration can be achieved by sharing the valence electron between the atoms.