November 23, 2024, 12:27:01 PM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: IR spectroscopy functional group determination?  (Read 1400 times)

0 Members and 1 Guest are viewing this topic.

Offline AussieKenDoll

  • Full Member
  • ****
  • Posts: 123
  • Mole Snacks: +0/-0
IR spectroscopy functional group determination?
« on: March 08, 2019, 03:38:58 AM »
Look at the picture I attached, according to IR  spectrum there are C=O and 0-H bond at  1705 cm–1 and 3450 cm–1 respectively, but there are many peaks on the spectrum, what do they indicate?
Logged

Offline Corribus

  • Chemist
  • Sr. Member
  • *
  • Posts: 3550
  • Mole Snacks: +545/-23
  • Gender: Male
  • A lover of spectroscopy and chocolate.
Re: IR spectroscopy functional group determination?
« Reply #1 on: March 08, 2019, 10:38:41 AM »
You'll never be able to assign all them them definitively. Many of them correspond to various C-H stretches, bends, and rocking motions. You'll also have some absorptions related to C-O stretches and bends, and some C-C motions as well.
Logged
What men are poets who can speak of Jupiter if he were like a man, but if he is an immense spinning sphere of methane and ammonia must be silent?  - Richard P. Feynman

Offline wildfyr

  • Global Moderator
  • Sr. Member
  • ***
  • Posts: 1776
  • Mole Snacks: +203/-10
Re: IR spectroscopy functional group determination?
« Reply #2 on: March 08, 2019, 01:30:34 PM »
The C-H stretches around 2950 can be somewhat well assigned, but after that it gets pretty difficult.
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links