6. Which of the following projection formulas show a meso structure?

Organic Chemistry
9th Edition
ISBN:9781305080485
Author:John E. McMurry
Publisher:John E. McMurry
Chapter5: Stereochemistry At Tetrahedral Centers
Section5.SE: Something Extra
Problem 62AP
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6. Which of the following projection
formulas show a meso structure?
CH2OH
8. The following two structures
represent:
ÇOOH
COOH
H-C-Ca
H-
-CH, H,C-
-OH
Br-C-H
a)
CH3
CH3
a) a pair of enantiomers
b) diastereomers
c) cis-trans isomers
d) the same compound
H-C-OH
H-C-OH
COOH
CH3
9. Who discovered optical activity?
a) J. H. van't Hoff
b) J. A. LeBel
c) L. Pasteur
d) Kekule
b)
H-C-OH
OH-C-H
10. Which object below is achiral?
a) glove
b) shoe
c) scissors
d) sphere
CH3
CH3
c)
H-C-OH
H-C-OH
CH3
11. Which of the following is not true
about enantiomers?
d)
a) They usually differ in biochemical
properties.
b) They are nonsuperimposable on each
other.
c) They have different melting points.
d) One form may be more
physiologically active than a racemic
mixture.
7. The following molecule can exist as:
CH;CHCICHBRCH2CH;
a) two pairs of enantiomers
b) two meso compounds
c) one pair of enantiomers plus a meso
compound
d) one pair of enantiomers
Transcribed Image Text:6. Which of the following projection formulas show a meso structure? CH2OH 8. The following two structures represent: ÇOOH COOH H-C-Ca H- -CH, H,C- -OH Br-C-H a) CH3 CH3 a) a pair of enantiomers b) diastereomers c) cis-trans isomers d) the same compound H-C-OH H-C-OH COOH CH3 9. Who discovered optical activity? a) J. H. van't Hoff b) J. A. LeBel c) L. Pasteur d) Kekule b) H-C-OH OH-C-H 10. Which object below is achiral? a) glove b) shoe c) scissors d) sphere CH3 CH3 c) H-C-OH H-C-OH CH3 11. Which of the following is not true about enantiomers? d) a) They usually differ in biochemical properties. b) They are nonsuperimposable on each other. c) They have different melting points. d) One form may be more physiologically active than a racemic mixture. 7. The following molecule can exist as: CH;CHCICHBRCH2CH; a) two pairs of enantiomers b) two meso compounds c) one pair of enantiomers plus a meso compound d) one pair of enantiomers
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