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Unformatted text preview: Name____________________________ CHE 301: Organic Chemistry I Fall, 2002 Exam 2 1) Multiple choice. (45 pts) 1) In a reaction energy diagram of a multistep reaction, which best describes the rate-determining step? a) the step that involves the highest energy transition state b) the first step c) the step with the highest activation energy d) the step leading to the products e) the step leading to the highest energy intermediate 2) Which best describes the geometry and the C-hybridization of a radical center? a) pyramidal, tetra-coordinated sp 3 C-atom b) planar, trigonal sp 2 C-atom c) pyramidal, tris-coordinated sp 3 C-atom d) pranar, trigonal sp C-atom 3) The major monobrominated product which results when ethylcyclohexane is subjected to free radical bromination is a) a primary bromide b) a secondary bromide c) a tertiary bromide d) a quaternary bromide e) a benzylic bromide 4) Which of the following alkyl halides is most likely to undergo rearrangement in an S N 1 reaction? Spring 2010 class cannot do this yet a) 3-bromopentane b) 2-chloro-3,3-dimethylpentane c) 3-chloropentane d) bromocyclohexane e) 1-bromo-3-ethylcyclohexane 5) Which of these solvents could be described as polar and protic? a) ethanol b) acetonitrile c) dimethylformamide d) acetone e) 18-crown-6 6) How many diastereomers are there of the molecule shown below?...
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