1. INFRARED (IR) SPECTROSCOPY

2. IR Spectroscopy – The Spectrum

4. IR Spectroscopy

5. h IR Spectroscopy - Theory

6. Energy is proportional to the frequency n of the vibration Frequency is related to the force constant (K) and the Reduced mass (  E n = (n + ½)h, n = 0, 1, 2, 3,…. IR – Bond Properties and Absorption Trends The molecule may possess only quantized amounts of energy.

7. IR – Bond Properties and Absorption Trends

8. IR – Modes of Stretching and Bending

9. IR – Correlation Chart

12. IR – Pentane; neat vs gas phase vs CCl 4 solution neat CCl 4 solution Gas phase

13. IR – Alkyl Halides

14. IR – Alkenes

15. IR – Alkenes: Out Of Plane bending (the oop region)

16. IR – Alkynes 1-heptyne

17. IR – Aromatics

18. IR – Aromatics; Substitution Pattern

19. IR – Alkenes: Out Of Plane bending (the oop region)

20. IR – Alcohols and Phenols

21. IR – Alcohols; 1 o vs 2 o vs 3 o

22. IR – Unknown (C 6 H 14 O)

23. IR – Ethers

24. IR – Carbonyl compounds

25. IR – Ketones Conjugation effects

26. IR – Ketones Conjugation effects

27. IR – Aldehydes

28. UNKNOWN C 8 H 8 O

29. IR – Carboxylic Acids

30. IR – Esters

31. UNKNOWN C 8 H 8 O 2

32. IR – Amides

33. Nitrogen Containing Compounds Amides Amines Nitro- Nitrile

34. IR – Amides C 5 H 11 NO Isomers

35. IR – Amines (Anilines)

36. IR – Nitriles and Nitros

37. IR Problem 5c (page 92, Intro to Spectroscopy, 3 rd Ed.)

38. IR Problem 5g (page 94, Intro to Spectroscopy, 3 rd Ed.)