Question

Suggest the most important type of intermolecular attractive interaction in the following pairs: ${\mathrm{I}}_2\mathrm{and}{\mathrm{CCl}}_4$.

Answer 1

Inter-molecular attractive interaction in ${\mathrm{I}}_2\mathrm{and}{\mathrm{CCl}}_4$

• Van der Waals interactions are primarily responsible for these intermolecular forces.
• Since these are non-polar molecules.
• Thus Iodine and Tetracholoromethane will not develop partial charges and hence weak London forces exist between the two.
• The two molecules of the same material (though electrically neutral) are brought together.
• The nonbonding electrons of both overlap each other and result in the repulsive force due to the presence of the surface electron.
• 

Hence, the interaction between Iodine and tetrachloromethane is Van der Waals's force.