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Unformatted text preview: Chem 30A, Winter 2006
Prof. Garrell CHEM 30A
WEEK'I SYNOPSm GOALS AND ASSIGNMENTS FOR JAN. 9 THROUGH JAN. 13, 2006
MOLECULAR STRUCTURES 8c REACTION ENERGETICS TOPICS: G OALS: Lewis structure recap
Oxidation and reduction in organic chemistry Reaction energetics: Gibbs free energy change, activation energy , reaction
mechanisms Overview of reaction types Representations of molecules, from molecular formulas to three-dimensional visualization Functional groups Bond and molecular dipoles; polarity Lewis structures and resonance Molecular orbital theory recap Refresh your Lewis structure—drawing skills, including assignment of formal charges Be able to recognize oxidation and reduction (Read text pp. 232—235; will not be covered
explicitly in lecture, but concept will be used.) Understand the following terms: Gibbs free energy reaction rate
exergonic functional group
exothermic reaction intermediate
endothermic rate-determining step potential energy diagram
transition state activation energy(Ea, AGl) reaction mechanism
heterolytic radical Become familiar with the various two- and three-dimensional representations of molecules,
and the structural information each reveals.
Be able to identify functional groups (Molcular structures synopsis, p. of 2) y 4:7;huwlsrmmwuw" wmmig m w MW‘ V Mara,»me c ,- i s “we ., y,’»t.::‘MiSMkk/WK.<“¢J Maw,» mmm a» w:.~.nwmmm:a la; .mxmmmmymthWM-m ASSEGNMENWS!
\/ BFI: Sections 1.1—1.4, 6.2,6.5 (pp. 232-5) OTHER RESOURCES
\/ Weeks’s Pushing Electrons: Section on formal charge, pp. 20-25 and Chapter 1 (Lewis structures) PROBLEMS
BFI: Ch. 1: #25, 26, 27, 28, 30, 31, 33-39, 41-44.
If you want to get a head start on next week: #48, 50,21,53—55, 57, 58. . ..m0re to come. Extra problem
A. - Write Lewis structures for each of the following compounds. (If needed, review the section in your general chemistry textbook on Lewis structures, or review the material in
the Pushing Electrons workbook. Note that we’ll be recapping Lewis structures in Week
2.) a) CH3CHZOH (ethanol) b) CF3COOH (trifluoroacetic acid, or TFA) c) (CH3)2CO (acetone) d) CH2C12(dichloromethane) e) C6H6 (benzene) - In which compound is the boldface type of carbon atom in the highest oxidation state? In
the lowest oxidation state?
- Name the functional group, if any, in each of the above compounds. UPCOMING DATES 8c DEADLINES:
January 20 is the last day to drop Chem 30A (impacted class). ...
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