which of these organic compounds form H bonds?

Question

Choose all that apply.

Ether – alcohol

Amine - ether

Ketone – water

Alcohol-alcohol

Alcohol – water

Aldehyde-aldehyde

Ketone-ketone

Aldehyde- alcohol

Ether – water

Ether-ether

Answer 1

In order to have "H-bonds", one of the strongest of the Intermolecular Forces, between two molecules at least one of the hydrogen (H) atoms in the molecule must be directly bonded to an oxygen (O), nitrogen (N), or fluorine (F) atom.

Lets break these down by functional group:

ether - contains a C-O-C bond, no H atoms bonded to O

alcohol - contains an O-H group on one of the carbons (R-O-H), has H bonds

amine - contains an N-H or NH₂ group attached to a carbon, has H-bonds

ketone - contains a carbonyl -C=O group attached to a C which isn't at the end of the carbon chain, no H-bonds

aldehyde - contains a carbonyl group -C=O at one of the terminal C atoms, no H-bonds

water - H₂O, contains two O-H bonds, has H bonds

Now for two molecules to for H-bonds with each other, they both must have H-bonds so that means we have the possibilities of alcohols, amines, and water interacting with each other, but none of the other molecules will form them, even if the molecule it is interacting with does have the ability to do so.

Correct answers: Alcohol-alcohol, Alcohol – water