Interaction Type
Example Average Strength, kcal/mol (kJ/mol) Range**
Charge-dipole -NH3+ Cl-   1/r2
Dipole-dipole ClCH3 ClCH3    1/r3
Dipole-induced dipole* CH4 ClCH3 0.1-0.2 (0.4-4)  1/r6
Dispersion*
(induced dipole-induced dipole)
CH4 CH4

0.1-0.2 (0.4-4)
1/r6
Hydrogen bond  two H-bonded water molecules 3-8 (12-30)  

 van der Waals repulsion
    1/r12

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Plot of covalent hydrides in groups 4A-7A

 

 

 

© R A Paselk

Last modified 8 April 2011