Differences between intermolecular forces

Moderators: Chem_Mod, Chem_Admin

Daniela Santana 2L
Posts: 103
Joined: Wed Sep 30, 2020 9:59 pm

Differences between intermolecular forces

Postby Daniela Santana 2L » Sun Dec 06, 2020 4:56 pm

Hi, can someone explain to me the differences between each type of intermolecular forces and how to differentiate between them? I know that there are some that are the same but just have different names, which are those?

Thanks a lot!

Olivia Monroy 1A
Posts: 107
Joined: Wed Sep 30, 2020 10:00 pm

Re: Differences between intermolecular forces

Postby Olivia Monroy 1A » Sun Dec 06, 2020 5:05 pm

Interactions between molecules:
Ion-ion intermolecular interactions are an interaction between opposite charged ions.
Ion-dipole is an ion with a nonionic molecule but nonionic molecules still have ionic behavior (dipole moment) so they can be an interaction
dipole-dipole is the attraction of two dipole moments in two molecules
dipole-induced dipole is a molecule with a dipole moment which induces a dipole moment in a non polar molecule (so even non polar molecules with no dipole moment can have an instantaneous dipole)
Induced dipole induced dipole (lavelles favorite name for this interaction) (London, dispersion, etc this is the one with many names) two induced dipole moments (two non polar molecules) to form an interaction
Hydrogen bond in molecule with H covalently bonded to N, O, F and close to another with N, O, or F

Olivia Monroy 1A
Posts: 107
Joined: Wed Sep 30, 2020 10:00 pm

Re: Differences between intermolecular forces

Postby Olivia Monroy 1A » Sun Dec 06, 2020 5:06 pm

A hydrogen bond is like a dipole dipole but more specific

jasmineculilap_3F
Posts: 101
Joined: Wed Sep 30, 2020 9:40 pm

Re: Differences between intermolecular forces

Postby jasmineculilap_3F » Sun Dec 06, 2020 5:24 pm

There's ion-ion, ion-dipole, dipole-dipole, dipole-induced dipole, and induced dipole-induced dipole. Ion-ion is between 2 ions (Na+ and Cl-). Ion-dipole is between an ion and something that's not an ion but has ionic characteristic (Cl and H2O). Dipole-dipole is between two non ions but they still have ionic characteristics/polarity. Dipole-induced dipole is between something with ionic characteristics that then causes a fluctuating dipole of the other. Induced dipole-Induced dipole can occur between any atoms/molecules and is caused by fluctuating electron density. The bond with multiple names is the induced dipole-induced dipole and is also known as dispersion/VDW/london forces.


Return to “Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)”

Who is online

Users browsing this forum: No registered users and 3 guests