McMinn
Study Guide -- Lab 5
After reading section 14-11 (pages 616-619) of Vollhardt and Schore, you should be able to do the following: 1. State the wavelength ranges for ultraviolet spectroscopy and visible spectroscopy. 2. State what type of excitation occurs when a molecule absorbs ultraviolet or visible light. 3. Rank the following excitations from lowest energy to highest: sigma -->sigma*, pi-->pi*, and n-->pi*. 4. State the two parameters that define the position of a peak. 5. Define HOMO and LUMO.
After reading section 11-5 (pages 452-458) of Vollhardt and Schore, you should be able to do the following: 1. State the wavelength ranges for infrared spectroscopy. 2. State what type of excitation occurs when a molecule absorbs infrared light. 3. State two parameters that will affect the frequency of a vibration. 4. State two reasons why IR spectroscopy is useful for organic chemists. 5. Explain what is meant by the "fingerprint region".
After reading pages 852-870 of Pavia et al., you should be able to do the following: 1. Relate the infrared region to others in the electromagnetic spectrum. 2. Define wavenumber, explain how it can be calculated from wavelength, and relate it to energy. 3. Describe the simplest types of vibrational modes. 4. Explain how a symmetric stretch differs from an asymmetric stretch. 5. Know the approximate regions in which various functional groups and bonds absorb (Figure IR.2 and Table IR.2). 6. Understand how to use correlation tables and correlation charts. 7. Analyzean infrared spectrum using correlation tables and checklist (p. 858).
After reading pages 803-816 of Pavia et al., you should be able to do the following: 1. Explain how to obtain a neat spectrum of a liquid sample using NaCl plates. a. Describe any necessary precautions when working with NaCl plates. b. State the two factors affecting the thickness of the liquid sample film. c. State how many drops of sample are usually necessary to get a good spectrum. d. Describe how to clean and store the NaCl plates. 2. Explain what circumstances require the use of AgCl plates. 3. Explain how to prepare a KBr pellet of a solid sample. 4. Identify sources which may create or cause formation of unsatisfactory KBr pellets. 5. Explain how to obtain a spectrum of a solid sample using NaCl plates. a. Discuss why CCl4 is used as a solvent. b. Discuss hazards associated with the use of CCl4 as a solvent. 6. Describe a solution cell and when it can be used. 7. Describe a Nujol mull and when it should be used.
After reading pages 401-410 of Pavia et al., you should be able to do the following: 1. Describe the chemical structure of a polymer. 2. Know the basic difference between addition, condensation, and cross-linked polymers. 3. Use the structures in Tables 1 and 2 in conjunction with the IR correlation tables to identify a polymer.
After reading section 11-5 (pages 452-458) of Vollhardt and Schore, you should be able to do the following: 1. State the wavelength ranges for infrared spectroscopy. 2. State what type of excitation occurs when a molecule absorbs infrared light. 3. State two parameters that will affect the frequency of a vibration. 4. State two reasons why IR spectroscopy is useful for organic chemists. 5. Explain what is meant by the "fingerprint region".
After reading pages 852-870 of Pavia et al., you should be able to do the following: 1. Relate the infrared region to others in the electromagnetic spectrum. 2. Define wavenumber, explain how it can be calculated from wavelength, and relate it to energy. 3. Describe the simplest types of vibrational modes. 4. Explain how a symmetric stretch differs from an asymmetric stretch. 5. Know the approximate regions in which various functional groups and bonds absorb (Figure IR.2 and Table IR.2). 6. Understand how to use correlation tables and correlation charts. 7. Analyzean infrared spectrum using correlation tables and checklist (p. 858).
After reading pages 803-816 of Pavia et al., you should be able to do the following: 1. Explain how to obtain a neat spectrum of a liquid sample using NaCl plates. a. Describe any necessary precautions when working with NaCl plates. b. State the two factors affecting the thickness of the liquid sample film. c. State how many drops of sample are usually necessary to get a good spectrum. d. Describe how to clean and store the NaCl plates. 2. Explain what circumstances require the use of AgCl plates. 3. Explain how to prepare a KBr pellet of a solid sample. 4. Identify sources which may create or cause formation of unsatisfactory KBr pellets. 5. Explain how to obtain a spectrum of a solid sample using NaCl plates. a. Discuss why CCl4 is used as a solvent. b. Discuss hazards associated with the use of CCl4 as a solvent. 6. Describe a solution cell and when it can be used. 7. Describe a Nujol mull and when it should be used.
After reading pages 401-410 of Pavia et al., you should be able to do the following: 1. Describe the chemical structure of a polymer. 2. Know the basic difference between addition, condensation, and cross-linked polymers. 3. Use the structures in Tables 1 and 2 in conjunction with the IR correlation tables to identify a polymer.