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| Recap |
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this Lecture you have learnt the following |
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Summary |
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In the present lecture we outlined various types of interactions other than the common covalent interactions. Among charged or dipolar species, different interactions such as ion-ion, ion-dipole, dipole-dipole, ion induced dipole,... prevail and the formulae for these have been given. Dispersion interactions exist between any pair of entities and at large distances, they fall off as r-6. Hydrogen bonding is a short range interaction, occurring when a hydrogen atom is sandwiched or shared between two electronegative atoms. |
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Recent work shows that the requirement of two electronegative atoms is not required and molecules such as methane and benzene also participate in hydrogen bonding. Interactions other than covalent and ionic are much weaker and fall off rapidly with distance. Sketches of various intermolecular forces have been given in the lecture. These non-covalent interactions play a central role in the formation of solids and liquids and a good understanding of these can assist greatly in obtaining materials with specifically designed properties. |
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Congratulations, you have finished lecture 10. To view the next lecture select it from the left hand side menu of the page |
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