2. IR Spectroscopy Wu L.M. http://walk.to/wu Salesians of Don Bosco Ng Siu Mui Secondary School

3. HKAL ( * * )

4. HKAL Syllabus: Instrumentation Analysis An awareness that spectroscopic methods such as infra-red spectroscopy and nuclear magnetic resonance (NMR) can provide information about the structure of a molecule.

5. nuclear magnetic resonance (NMR) NMR spectroscopy typically gives the hydrocarbon fragments

6. infra-red spectroscopy the most useful information obtained from an IR spectrum is what functional groups are present within the molecule

7. Topic: Use of infra-red (IR) spectrum in the identification of functional groups IR spectrum and its use in the identification of the following groups: C-H O-H N-H C=C C C=O and C N (Instrumentation is not required)

8. Suggested Experiments / Activities Inspection of IR spectrum of organic compounds.

9. IR Spectroscopy Instrument http://hk.geocities.com/tempalbu m/

10. 7 IR Characteristic peaks 7 vibrational movement (covalent bond ) 7 (peak)

11. IR spectrum analysis (infrared spectroscopy) ( )

15. / cm -1 Alkane, C – H 2850 – 2960 Alkene, =C – H 3020 – 3100 Alkene, C=C 1650 – 1670 Alkyne, C – H 3300 Alkyne, – CC – 2100 – 2260 Alcohol, O – H 3400 – 3640 Alcohol, C – O 1050 – 1150 Carboxylic, O – H 2250-3100 Amine, N – H 3310 – 3500 Amine, C – N 1030, 1230 Carbonyl, C=O 1670 – 1780 Nitrile, CN 2210 – 2260

16. Characteristic Infra-red Absorption Wave number Ranges (Stretching modes) HKAL

17. IR spectrum

18. IR Real Spectrum

19. IR Spectroscopy Experiment

20. Learning time………. Are you read to examine some IR Spectrum?

21. Alkane C-H 2840-3095

22. Alkene C=C 1610-1680 =C-H 3020-3100

23. Alkynes C C 2100-2260 C-H 3300

24. Alcohol O-H 3400-3640

25. Alkanoic acid O-H 2250-3100

26. Amine N-H 3310-3500

27. Ketone C=O 1670-1780

28. Aldehyde C=O 1670-1780

29. Nitrile CN C N 2200-2260

30. Test time………. Are you read to identify one unknown IR Spectrum?

31. Ester Quick Test C=O 1670-1780 C-H 2840-3095

32. http://walk.to/wu http://hk.geocities.com/tempalbum/ http://orgchem.colorado.edu/hndbksupport/irtutor/tutorial.html http://www.hkedcity.net/resources/ires/ires_browse.phtml?res_c at_id=2870 http://www.chem.ucalgary.ca/courses/351/Carey/Ch13/ch13-ir- 1.html http://www.cofc.edu/~chem/organic/Slides/IR2c/sld019.htm