1. Briefly describe a solubility test or classification test (just name and result) that would allow you to distinguish between 1) an aldehyde and a primary alcohol. 2,4-DNP – test or Tollens test 2) an alcohol and a phenol. e.g. Solubility test: Phenols dissolve in dil. NaOH-solution; alcohols do not. Incorrect: ignition test for aromatic compounds. Some alcohols are aromatic, too! MiniQuiz 5 Answers:

2. Today: IR MiniQuiz Next time: Mass spectrometry Bring your spectra to class if you have them. MiniQuiz on today’s class

3. What information do we get from an IR spectrum? What is the cause for the typical absorptions? Spectroscopy Infrared Spectroscopy (IR) IR region = 4000 - 400 cm -1 (cm -1 unit is the wave number scale and is given by 1/wavelength in cm) E= h http://www.chem.ucla.edu/~webspectra/index.html

4. butyl acetate Fingerprint region

5. http://www.chem.ucla.edu/~webspectra/index.html

7. Aromatics aromatic overtones

8. http://www.chem.ucla.edu/~webspectra/index.html

10. Alcohols Gas phase!

11. Phenol

13. Ketones

14. Carboxylic Acids

15. Next time: Mass Spectrometry MiniQuiz on today’s class