Exam 2 practice

Exam 2 practice - Practice Problems for Exam 2 CHEM 231;...

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Practice Problems for Exam 2 CHEM 231; Organic Chemistry I Fall 2005 1. What is the IUPAC name for the following compound? a. 2-methyl-4-ethenyl-pentene b. 3,5-dimethyl-1,4-hexandiene c. (E)-1,4-dimethyl-3,5-hexadiene d. 1,1,3-trimethyl-1,4-pentadiene 2. What is the major product of the following reaction? H 2 O H 2 SO 4 HO OH OH OH a b c d CAN’T DO THIS!!!!! 3. Which of the following alkenes are likely to undergo rearrangement upon acid- catalyzed hydration (THIS REACTION IS SIMILAR TO ADDITION OF HX)? a. Ethene b. 3,3-dimethyl-1-butene c. 1-propene d. 2-methyl-2-butene
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4. What is the correct order of stability of the following carbocations? (most to least stable) 1 2 3 a. 1 > 2 > 3 b. 3 > 1 > 2 c. 1 > 3 > 2 d. 3 > 2 > 1 5. Which of the following alkenes undergoes the most exothermic hydrogenation upon treatment with H 2 /Pt? 1 2 3 4 a. 1 b. 2 c. 3 d. 4 6. Which of the following concepts explains Markovnikov’s rule as applied to the addition of HBr to propene? a. The relative stability of carbocations b. The nucleophilicity of bromide anion c. The acidity of HBr d. The Aufbau principle 7. Addition of HCl to 3-methyl-1-pentene gives two products. One of these is 2- chloro-3-methylpentene. What is the other product? a. 1-chloro-3-methylpentane b. 3-chloro-3-methylpentane c. 3-chloro-2-methylpentane d. 2-chloro-3-methylpentane
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8. Predict which of the following alkenes reacts fastest with HCl? a. CH 3 CH 2 CH 2 CH 2 CH=CH 2 b. (Z)-CH 3 CH 2 CH=CHCH 2 CH 3 c. (E)-CH 3 CH 2 CH=CHCH 2 CH 3 d. (CH 3 ) 2 C=CHCH 2 CH 3 9. Which of the following is least likely to react with an alkene? a.
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This homework help was uploaded on 04/20/2008 for the course CHEM 231 taught by Professor Montaguesmith during the Spring '06 term at Maryland.

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Exam 2 practice - Practice Problems for Exam 2 CHEM 231;...

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