info_Exam_1_GAME_PLAN

info_Exam_1_GAME_PLAN - 2. Write structural formulas for...

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CHEMISTRY 237B Autumn Quarter 2005 GOALS: It should be abundantly clear from your lecture notes that the key topics targeted by the exam are: 1. Electronic representation of molecules (Lewis structures) 2. 3-D representation of molecules 3. Isomerism a. Constitutional b. Stereoisomerism i. Conformational ii. Cis-Trans You must COMBINE NOTES AND TEXT (Chapters 1, 2, 3 plus 5.2-5.4 and 9.4 and “Less is More”) TO MASTER IDEAS, rather than merely memorize formulas, THAT YOU CAN APPLY TO PROBLEMS YOU HAVE NOT SEEN BEFORE. (Practicing with the book problems and, especially, the GAME PLAN, will be just fine, no need to search for old exams).
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GAME PLAN FOR CHEMISTRY 237B Autumn Quarter 2005 First Hour Exam 1. A) Give a 3-D drawing for the following: a. Two conformational isomers of CH 3 CH 2 NH 2 b. HCOOCH 3 B) Order the following isomeric molecules according to stability (write 1 for the MOST stable, etc.) given the heats of combustion (in kJ/mol) given underneath each one. Give the IUPAC name of the most stable one.
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Unformatted text preview: 2. Write structural formulas for all the constitutionally isomeric compounds having the given molecular formula a. C 3 H 7 F Write TWO constitutional isomers of C 2 H 6 such that ONE is ALKENE and ONE is CYCLOALKANE. 3. Write the Newman projections for the most stable conformation of each of the following. Show any lone pairs. a. HO-OH b. H 2 C +-CH 3 4. Encircle the more stable stereoisomer within each pair. a. and 5. a. Write one pair of cis / trans isomers for Dimethylcyclopropane b. For FClC = CHBr 6. Write the products of the following Acid-Base reactions. H 3 N + BF 3 + (CH 3 ) 3 C + CH 3 OH 7. In each of the following acid-base equilibria, label each molecule as Acid (A), Base (B) (on the left) Conjugate Acid (CA) and Conjugate Base (CB) (on the right). Also, place under each question mark an arrow showing the direction of the equilibrium. NH 3 + ? + NH 4 + 36 16 9.3 Number shown under formulae are pK a values needed for determining the direction of equilibrium....
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info_Exam_1_GAME_PLAN - 2. Write structural formulas for...

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