Problem Set 7

Problem Set 7 - Chemistry 123 1. 2. Problem Set 7 Organic...

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Chemistry 123 Problem Set 7 Organic Chemistry II 1. How many constitutional isomers of C 7 H 16 have chiral centres? (1) 1 (2) 2 (3) 3 (4) 4 (5) none 2. Indicate which of the following compounds are chiral (can exhibit optical activity). (a) 3-methylhexane (c) 3-chloro-1-butene (b) 3-ethylhexane (d) 3-methyl-1-butene 3. Name the compound: Cl H CH 3 H 4-8. Assign absolute stereochemistry (R, S) to the chiral centres in each of the following. Use the following answer choices: (1) R (2) S 4. CH 2 CH 3 C Br H H 3 C 5. CH 2 CH 3 C Br Cl H 3 C 6. CH 3 C CH 3 CH 2 I Br 7. CH 3 C NH 2 H 8. COOH C HOOCCH 2 H NH 2 9. Which of the following structures correspond to (R)-lactic acid from milk? (1) H C OH HOOC H 3 C (2) H C OH CH 3 HOOC (3) COOH C H CH 3 OH (4) COOH C CH 3 H HO (5) COOH C OH H H 3 C 1
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10. The natural amino acid, cysteine, HSCH 2 C(NH 2 )H-COOH is in the R configuration. Which of the following structures correspond to (R)-cysteine? (1) COOH C CH 2 SH H H 2 N (2) COOH C CH 2 SH H 2 N H (3) CH 2 SH C COOH H H 2 N (4) CH 2 SH C COOH H 2 N H (5) COOH C CH 2 SH H
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Problem Set 7 - Chemistry 123 1. 2. Problem Set 7 Organic...

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