recit number6 - a. 1-butene + HCl b. cyclohexene + HBr c....

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Chem 151 Fall 2009 Problem Set # 6 1. Which of the following conformers has the highest energy? CH 3 Cl CH 3 Cl CH 3 Cl A B C 2. Which of the following structure(s) represent(s) a cis isomer? CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 CH 3 A B C D 3. Draw the two chair conformers for each of the following, and indicate which conformer is more stable: a. cis -1-ethyl-3-methylcyclohexane b. cis -1-ethyl-2-isopropylcyclohexane c. cis -1-ethyl-3-isopropylcyclohexane 3. For each of the following disubstituted cyclohexanes, indicate whether the substituents in the two chair conformers would be both equatorial in one chair conformer and both axial in the other or one equatorial and one axial in each of the chair conformers: a. cis -1,2- b. trans -1,2- c. trans -1,4- d. cis -1,4- one of each both both one of each
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4. What stereoisomers are obtained from the following reactions:
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Unformatted text preview: a. 1-butene + HCl b. cyclohexene + HBr c. cis-3-heptene + Br 2 d. trans-3-hexene + Br 2 5. Draw all possible stereoisomers for each of the following compounds. Indicate if no stereoisomers are possible. a. 1-bromo-2-chlorocyclohexane b. 2-bromo-4-methylpentane c. 3,3-dimethylpentane d. 3-heptene 6. Which of the following are optically active? CHBr 2 Cl BHFCl CH 3 CHCl 2 CHFBrCl BeHCl 7. Give the products, including their configurations, obtained from the reaction of 1-ethylcyclohexene with the following reagents: a. HBr b. H 2 , Pt/C c. BH 3 /THF followed by HO-, H 2 O 2 , H 2 O d. Br 2 /CH 2 Cl 2 Cl Cl Br Br Br Br Br Br Br Br Cl Br Cl Br Cl Br Cl Br Br Br OH H H OH Br Br Br Br...
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recit number6 - a. 1-butene + HCl b. cyclohexene + HBr c....

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