Identifying pd-pd and id-id bonds and molecular geometry names

[Potato Head]

TL;DR

I cannot understand what are pd-pd and id-id forces.

I cannot understand what are pd-pd and id-id bonds along with how to identify them. I think this is related to something about polar molecules but I’m just really lost right now.


I also need help on how to remember the names of the different shapes that the compounds form; e.g - Trigonal Planer.

 

[Borek]

If the molecule has a permanent dipole, it can participate in pd-pd bonds, if it doesn't have the permanent dipole - induced dipoles is the only thing it can count on.

 

[Potato Head]

Can you please explain what permanent dipoles are?

 

[Borek]

First hit when I google: https://en.wikipedia.org/wiki/Dipole#:~:text=Permanent dipoles,is called a polar molecule.