Chemistry question

Which type of bonding are present in CH3CHO in the liquid state?

I. Single covalent bonding
II. Double covalent bonding
III. Hydrogen bonding.

I chose I, II, III but the answer is only I and II. Now, I don't know if it means in one single molecule of CH3CHO? Cause hydrogen bonding does occur in aldehyde I think?

Reply 1

burje-t

akk713

No, there is no hydrogen bonding in an aldehyde. The oxygen and hydrogen is bonded to the carbon seperately.

Reply 2

The Imperator

burje-t

No, there is no hydrogen bonding in an aldehyde. The oxygen and hydrogen is bonded to the carbon seperately.

i was about to disagree but no, u r right.

Otherwise they'd be called O-Bonds

Reply 3

kobelk

according to the markscheme, it's A.

Reply 4

A0307

Aldehydes can form hydrogen bonds with water but not with themselves. In the liquid state there will be covalent bonds within each molecule, with van der Walls and polar-polar attractions between molecules - but no hydrogen bonding.

Reply 5

ancksha

Now listen to the prof :smile:

H-bonding can only occur if there are bonds

-O-H
-N-H
-F-H

in a molecule and not of just if N&H, O&H or F&H are present. I thought that too until last week :smile:

But my teacher told me this :smile:

)

Reply 6

The Imperator

ancksha

in a molecule and not of just if N&H, O&H or F&H are present.