London disperson

[Montana James 4G]

just to clarify, all molecules can have london dispersion forces, right? can someone explain why?

[Myka G 1l]

All molecules have London dispersion forces because all molecules have electrons that are constantly moving around the molecule and can temporarily congregate to one side, creating a temporary partial negative charge. The more electrons present and the larger an atom is, the stronger these forces will be.

[Daniel Toscano 1L]

To add on, at some point, LDF can be stronger than some other intermolecular forces if the molecules is large

[Angela Patel 2J]

Is London dispersion the same thing as dipole-dipole or van der waals forces? Do we have to mention all of these

[KnarGeghamyan1B]

London dispersion is the same as Van der waals but not the same as dipole dipole. Dr.Lavelle said he prefers induced dipole induced dipole when describing London forces but it doesn’t matter all are correct.

[Nuoya Jiang]

Yes, because the electrons in all the molecules have a chance to move to a place where a dipole appears.

[Megan Jung 3A]

yes, this is because at some point there will be an induced dipole moment between the molecules creating some intermolecular force even if it is not very strong. This is due to electron clouds moving.