April 25, 2024, 06:33:34 PM
Forum Rules: Read This Before Posting


Topic: Cyclohexanol proton NMR  (Read 21393 times)

0 Members and 1 Guest are viewing this topic.

Offline kt

  • Very New Member
  • *
  • Posts: 2
  • Mole Snacks: +0/-0
Cyclohexanol proton NMR
« on: August 07, 2010, 11:23:51 PM »
I'm analyzing the protein NMR below and I'm trying to find which hydrogens correspond to which peaks.  I was wondering how to determine the appropriate label for the four hydrogens I am missing in this chair conformation of cyclohexanol.  I know that none of the missing hydrogens are Ha or Hb.

Thanks.


Offline willug

  • Regular Member
  • ***
  • Posts: 61
  • Mole Snacks: +4/-3
Re: Cyclohexanol proton NMR
« Reply #1 on: August 08, 2010, 12:27:30 PM »
I tried to do this in my head to start with but failed miserably. If you make a model then the symmetery is so much easier to see. The four remaining labels are, starting with the carbon on the far left; axial Hf, equatorial Hd then the middle carbon; axial Hf, equatorial Hc.

Offline kt

  • Very New Member
  • *
  • Posts: 2
  • Mole Snacks: +0/-0
Re: Cyclohexanol proton NMR
« Reply #2 on: August 08, 2010, 12:33:41 PM »
Thank you.  That was very helpful.

Offline willug

  • Regular Member
  • ***
  • Posts: 61
  • Mole Snacks: +4/-3
Re: Cyclohexanol proton NMR
« Reply #3 on: August 08, 2010, 01:27:51 PM »
Ah! Sorry I've made a mistake. The two protons you have labeled as Hf on the spectrum below are in different environments. There should be a Hh too. Also; http://orgchem.colorado.edu/labquizzes/oxal/cyclohexanol.jpg  ??
« Last Edit: August 08, 2010, 02:02:51 PM by willug »

Sponsored Links