What is the difference between an ion-induced dipole attraction and just an ion-dipole attraction?

By what I've read, an **ion-induced dipole** attraction is a weak attraction that results when the approach of an ion creates a dipole in a ***non-polar*** atom or in a ***non-polar*** molecule by disturbing the arrangement of electrons in the non-polar species. So this is a dispersion/van-der-Waal force, I believe? 


On the other hand, an **ion-dipole** attraction is a weak attraction that results when the approach of an ion interacts with the dipole in a ***polar*** atom or in a ***polar*** molecule. And so this wouldn't be a van-der-Waal force would it? 




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If what I said above happens to be true, does the same apply with **dipole-induced dipole** forces and just **dipole-dipole** forces?


In this scenario, a dipole-induced dipole attraction would be a weak attraction that results when the approach of an dipole (polar covalent bond) creates a dipole in a ***non-polar*** atom or in a ***non-polar*** molecule by disturbing the arrangement of electrons in the non-polar species. So this is a dispersion/van-der-Waal force too, right?


And a dipole-dipole attraction would be a weak attraction that results when the approach of an dipole that *already exists* in a polar bond attracts with another dipole in another ***polar*** atom or in ***polar*** molecule.




It is useful to note the definition of a *van der Waal* force: **weak electric forces attracting neutral molecules to each other in gas** thus causing a gas to deviate from an ideal gas.


So, there are three types of these forces


1. Dipole-dipole force
2. Dipole-induced dipole force
3. London dispersion force


It becomes clear that forces involving ions do not fit van de Waals forces as the molecules involved must be neutral. 


An ion-induced dipole force is not a dispersion force, either (as dispersion forces are a subset of van der Waals), and with ion-dipole forces, ion-induced dipole forces have a category of it's own


A dipole-induced dipole force is a van der Waal force but not a dispersion force


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