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A chemistry exam from a university course, including multiple-choice questions related to drawing molecules, stereochemistry, mechanisms, reactions, and concepts such as sn1 and sn2. Students are required to identify nucleophiles and electrophiles, show mechanisms, and explain concepts in words.
Typology: Exams
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Part I. Name and/or draw the molecule. a. __________________________ b. __________________________ c. __________________________ d. __________________________ e. 3-bromo-3-ethylpentane __________________________ f. __________________________ g. an ________________________ h. ___________________________ i. ___________________________ j. Cyclohexane-1,3-dione ___________________________
Part II. Stereochemistry In the blank below the molecule, indicate whether the molecule is chiral or achiral. a. b. 3-methylhex-1-ene
Assign R or S to the following molecules. a. b.
Part III. Mechanisms. Show the movement of electrons and identify the reaction as SN1, E1, SN2, or E2. Please be specific with no “wishy-washy” arrows or lines. a. Type __________ Below use 1 or 2 as the response below, noting the two structures are numbered in Figure B. Figure B. Nucleophile? ________ Electrophile? _______ b. Type ________ Show the product in the space below. Show the mechanism using the species below.
Part III. Reactions a. b. H 2 SO 4 c. Bromobenzene + SO 3 d. e. f. g. h. i. j.
k. l. Part IV. Benzene and Aromaticity Use the models below to explain the benzene ring. Use the following words in the explanation: resonance, pi and sigma bonds, sp^2 hybridization, planar, bond length, p orbitals, overlap, hybrid, symmetrical, and above and below the x axis.
