ir presentation
play

IR Presentation By John H. Penn Visualization of Vibrations - PowerPoint PPT Presentation

Nov 09, 2023 •192 likes •348 views

IR Presentation By John H. Penn Visualization of Vibrations Methyl amine (all 15 vibrations) http://cheminf.cmbi.ru.nl/wetche/organic/vibr/ H2O, CO2, and Adamantane http://www.chm.bris.ac.uk/jmol/jmolv/vibrating

  1. IR Presentation By John H. Penn

  2. Visualization of Vibrations • Methyl amine (all 15 vibrations) – http://cheminf.cmbi.ru.nl/wetche/organic/vibr/ • H2O, CO2, and Adamantane – http://www.chm.bris.ac.uk/jmol/jmolv/vibrating mols/vibmenu.htm • Quite a few molecules – http://www.molwave.com/software/3dnormalm odes/3dnormalmodes.htm

  3. Cyclohexane

  4. 1-Propanol OH

  5. Propanenitrile C N

  6. Cyclohexanone O

  7. Heptanoic acid OH O

  8. OH Ethanoic acid O

  9. 2-Methylpentanal H O

  10. OMe Methyl Ethanoate O

  11. Interpreting IR Spectra Major Functional Groups Alcohol Nitrile Amine Carbonyl Group 3400-3600 cm -1 2220-2260 cm -1 3200-3400 cm -1 1650-1780 cm -1 No Other Features Ketone OH group C-H Shoulder C-O Stretch 3400-3600 cm-1 Exactly 2750 cm -1 1050-1250 cm-1 Broad Aldehyde Ester Carboxylic Acid

  12. What functional groups?

  13. What functional groups?

  14. What functional groups?

  15. What functional groups?

Recommend

More recommend