CHE 235 Unit 1 - Chemistry Solutions
CHE 240 Unit II – Chemical Reactions, Infrared Spectroscopy and Mass Spectrometry.
A. Introduction and Rationale:
The unit introduces the study of chemical reactions by use of mechanisms, kinetics, and thermodynamics. Also covered in this unit are the techniques of IR and Mass Spec as used in the structural determination of organic compounds and identification of unknown compounds.
B. Topics:
1. Free radical halogenation.
2. Equilibrium, free energy, enthalpy and entropy.
3. Kinetics and activation energy.
4. Transition states and intermediates.
5. Hammond Postulate.
6. Electromagnetic spectrum.
7. Infrared active and inactive regions.
8. Characteristic absorption patterns.
9. Interpretation of IR Spectra.
10. Introduction to Mass Spectrometry.
C. Objectives: The student should be able to:
1. Explain the mechanism of free radical halogenation of alkanes.
2. Determine the order of a reaction and suggest a possible mechanism based on its rate equation.
3. Use energy diagrams to discuss transition states, activation energies, intermediates, and rate determining step of a multi-step reaction.
4. Use the Hammond Postulate to predict whether a transition state will be more reactant-like or product like.
5. Describe the structures of carbocations, carbanions, free radicals, and the structural features that stabilize them.
6. Given an IR spectrum, identify the reliable characteristic peaks.
7. Predict the stretching frequencies of common functional groups.
8. Identify functional groups and unknowns from IR spectra.
9. Use mass spectra to identify the presence of Br, Cl, I, N, and S atoms.
10. Use a fragmentation pattern to determine whether a proposed structure is consistent with the mass spectrum.
D. Learning Activities:
1. Always attend all lectures and practice what you have learned by answering end of chapter Study Problems.
2. Read Chapter Four in Wade Text.
3. Review Chapter Four material on Wade website: Read Chapter Twelve in Wade Text.
4. Review Chapter Twelve material on Wade website:
5.
E Assessment:
1. Complete Exam on Unit Two
REVISION 8/1/09 TPS
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