utv
Badges: 11
Rep:
?
#1
Report Thread starter 3 weeks ago
#1
I understand that between 2 carboxylic acids there are hydrogen bonds forming a dimer. but what if there's a third carboxylic acid. does it form a dimer with a molecule which already has a dimer. Name:  IMG_20191021_195242-compressed.jpg.jpeg
Views: 7
Size:  10.8 KB
0
reply
hi_imcatherine
Badges: 15
Rep:
?
#2
Report 3 weeks ago
#2
This is a cool question, interested to see what the answer is
1
reply
R T
Badges: 12
Rep:
?
#3
Report 3 weeks ago
#3
No, it would be far more likely to find another molecule to form a dimer with.

The diagram you provided would not be stable geometrically. A typical hydrogen bond is only twice as long compared to a "covalent" OH bond. Since O is sp2 hybridised, COH will be a bond angle around 120 degrees and there simply is not enough space to properly align the Oxygen lone pair to the HO covalent bond. Notice that your Oxygen on the right with 2 hydrogen bonds has both bonds coming at almost the same angle, but there is only 1 lone pair in this location.

If R was small then it may be possible to stack H bonds with an offset but again I suspect forming many dimers is the initial goal for reducing the energy of the solution. Chemical structures tend to fall down this energy well slope quickly, its a major part of what drives protein folding in cells.
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • Trinity Laban Conservatoire of Music and Dance
    Contemporary Dance Undergraduate
    Tue, 19 Nov '19
  • University of Surrey
    All subjects except Veterinary Medicine and Guildford School of Acting Undergraduate
    Wed, 20 Nov '19
  • The University of Law
    Solicitor Series: Discover Your Type of Law - LPC and GDL - Birmingham campus Postgraduate
    Wed, 20 Nov '19

Which party will you be voting for in the General Election?

Conservatives (142)
18.83%
Labour (322)
42.71%
Liberal Democrats (153)
20.29%
Green Party (41)
5.44%
Brexit Party (21)
2.79%
Independent Group for Change (Change UK) (2)
0.27%
SNP (9)
1.19%
Plaid Cymru (6)
0.8%
Democratic Unionist Party (DUP) (1)
0.13%
Sinn Fein (1)
0.13%
SDLP (0)
0%
Ulster Unionist (1)
0.13%
UKIP (7)
0.93%
Other (8)
1.06%
None (40)
5.31%

Watched Threads

View All