Hydrogen Bonds [ENDORSED]

[MinjooPark_3I]

I remember learned that hydrogen bonds were dipole dipole. Does this mean that hydrogen bonds are just stronger types of dipole dipole bonds? Thanks for your help!

[Akshata Kapadne 2K]

Yes, I believe hydrogen bonds are a special type of dipole-dipole interaction, where it can only occur if a slightly positive hydrogen atom of one molecule is attracted to a highly electronegative atom, such as O, N and F, of another molecule.

[Eunice_Castro_1G]

Hi! Water molecules do have a dipole moment so an interaction between water molecules are in fact dipole dipole interactions. Yet, the interaction between water molecules is big that they start to form a strong bond (hydrogen bond), although not as strong as covalent bonds. Hope this helps!

[Gabriel Nitro 1E]

Hi,

Yes! Hydrogen bonding does originate from a separation of charge (i.e. partial positives and partial negatives) within the molecules in question, as does the case of dipole-dipole interactions. Hydrogen bonding, however, is simply a more perturbed separation of charge (or a stronger variant) due to the extremely high difference in electronegativities (i.e. as in nitrogen, oxygen, and fluorine).

Hope this helps! :)

[Nika Gladkov 1A]

Yes. Hydrogen bonds are a subset of dipole dipole bonds since they occur because the attraction between the partially positive charge on H and partially negative charge on another atom. Hydrogen bonding only occurs when hydrogen is covalently bonded to O, N or F because all of them are extremely electronegative. Additionally, for the H bond to form, the second at must also be highly electronegative and have a lone pair.

[Lily Mohtashami]

Can someone please explain what a dipole dipole bond is? We learned dipole moments however I have not heard dipole in any other context until this post.

[Chem_Admin]

Lily, I will go through this in my 3pm discussion section today.

[Abril Guanes 2A]

Can someone please explain what a dipole dipole bond is? We learned dipole moments however I have not heard dipole in any other context until this post.

Hello!
I am currently in Lavelle's office hours right now. He explained dipole dipole bonds in this manner. Suppose you have two water molecules. A dipole-dipole interaction would occur if the water molecules line up such that they interact favorably. This means if the oxygen, with a negative delta lines up so that it interacts with the hydrogen of another water molecule, which would have a positive delta. In essence, hydrogen bonds are stronger types of dipole-dipole interactions. Hope this makes sense!

[Abril Guanes 2A]

Lily, I will go through this in my 3pm discussion section today.

I've included an imagine to clear it up!

[Antonio Garcia 3A]

So a dipole-dipole interaction for a hydrogen bond is when the water molecules counteract eachother?--like the negative and positive delta line up to incur an interaction?