Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Transcribed Image Text:5 (a) (8 pts) (a) Box the most stable Z alkene (make sure it's Z!). (b) Circle the least stable E alkene.
(c) Label two alkenes which are neither E or Z.
NH₂
5 Je č
F
HO
NH₂
SH
5(b) (4 pts) Draw an example of two conformations of a molecule of your choice, and then draw a
separate example of two stereoisomers of another molecule of your choice.
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- Circle the letter of the correct answer. 1. Which of the following compounds is saturated? (a) propene (b) octane (c) 3-heptyne (d) 2-butene (e) 1-butene 2. Which formula represents an alkyne? (a) C5H8(b) C5H12(c) C5H16(d) C5H14(e) C5H10 3. What is the total number of covalent bonds in a molecule of C4H10O? (a) 10 (b) 12 (c) 14 (d) 16 (e) 18 4. What is the name of the alkyl group containing three carbon atoms? (a) diphenyl (b) trimethyl (c) propyl (d) methyl (e) butyl 5. What is the IUPAC name of the following molecule? (a) 2-bromo-4-isopropyl-3-methylbutane (b) 2-bromo-3,5-dimethylhexane (c) 3,4-dimethyl-2-bromohexane (d) 2-bromo-3-methyl-4-propylbutane (e) 2-bromo-3,5-dimethylheptane 6. Which of the following compounds is considered to be non-polar? (a) CH3CH2OH (b) CH3CHO (c) CH3COOH (d) CH3CH2NH2(e) CH3CH2CH3 (e) Ethylene glycol is insoluble in water. 7. The molecule CH3COCH3 is classified as: (a) an ether (b) an ester (c) an aldehyde (d) a ketone (e) a carboxylic acid 8.…arrow_forwardDraw the most stable conformation for each of the following substituted cyclohexanes. Show all conformation in Newman projections. Fill in hydrogens to indicate unsubstituted carbons.arrow_forwardplease answerarrow_forward
- Starting from the Newman projection below, rotate the back carbon to provide the structure in the least stable conformation. (H3C)₂HC H Q IX H^ H H CH3 oarrow_forward2 1 Group activity: Use molecular model to convert the given 3D perspective structure to Newman projection around C-C bond on the template provided. Fill in the substituent for the most stable conformation in the templates provided. H H OH Br OH CH Y/ 3D of most stable conformation ΕΙ Fischer projection of most stable conformation most stable conformation Use the molecular model of chair conformation of cyclohexane and fill in the substituents in the template provided for chair conformation and complete the Newman projections showing only substituents for given molecules. Circle the chair conformation which is more stable. 1) cis-3-isopropylcyclohexanol 2) trans-3-Isopropylcyclohexaol QOarrow_forwardCompounds 1 and 2 were prepared, and the difference in their heats of combustion was found to be 17.2 kJ/mol (J. Am. Chem. Soc. 1961, 83, 606-614): H H 1 Shown below are the lowest-energy conformations of compounds 1 and 2. Identify which drawing matches which compound, and identify which compound has the larger heat of combustion. H H H H |||I 2 H 4 H H The first drawing is compound 1, and compound 1 has a larger heat of combustion because it is the less stable compound. O The first drawing is compound 2, and compound 2 has a larger heat of combustion because it is the less stable compound. The first drawing is compound 2, and compound 2 has a larger heat of combustion because it is the more stable compound. The first drawing is compound 1, and compound 1 has a larger heat of combustion because it is the more stable compound.arrow_forward
- How do I name this compound? Specify (E)/(Z) stereochemistry, if relevant, for straight chain alkenes only.arrow_forwardComplete the Newman projection below to draw the most stable conformation of 3-methylpentane, looking down the C2-C3 bond. Identify each substituent using "H" for hydrogen and "Me" for methyl. a= b= c= d=arrow_forwardDraw all the isomers of C5H₁0. Clearly show stereochemistry if stereoisomers are possible. Step 1: Start by drawing all the isomers with double bonds. • Consider constitutional isomers, then stereoisomers. Step 2: Draw all isomers containing a ring. • Consider constitutional isomers, then stereoisomers. Consider the constitutional isomers of C5H₁0 that contain a 3-carbon ring. Do not draw stereochemistry. 10 Select C Draw H Rings More Erasearrow_forward
- Given the structures of the following two tetramethylcyclohexanes: CH3 CH3 CH3 "CH3 CH3 CH3 A В (a) Draw the most stable chair conformation for both A and B. Which structure is lower in energy (most stable)? (b) Ring flip the above structures and draw the least stable chair conformation for both A and B. Which structure is highest in energy (least stable)?arrow_forward3-44 Draw the two chair conformations of each compound and label the substituents as axial and equatorial. In each case, deter- mine which conformation is more stable. (a) cis-1-ethyl-2-isopropylcyclohexane (c) cis-1-ethyl-3-methylcyclohexane (e) cis-1-ethyl-4-methylcyclohexane (d) (b) trans-1-ethyl-2-isopropylcyclohexane trans-1-ethyl-3-methylcyclohexane trans-1-ethyl-4-methylcyclohexane (f)arrow_forwardUsing solid and dashed wedges, draw the structure of (1S, 2S, 4R, 5R)-1,5-dibromo-2,4- dichlorocyclohexane, then draw the most stable conformer.arrow_forward
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