[Skip Breadcrumb Navigation]
:
[Skip Breadcrumb Navigation]
Home
Chapter 6: Isomers and Stereochemistry
Quizzes
Quiz 2
Quiz 2
This activity contains 12 questions.
Which is a pair of diastereomers?
(
R,R
) and (
S,S
)
(
S,R
) and (
R,S
)
(
S,S
) and (
R,S
)
(
R,S
) and (
S,R
)
(
R,R
) and (
R,R
)
How many stereoisomers does 5-bromo-2-heptene have?
3 (one pair of enantiomers and a meso compound)
5 (two pairs of enantiomers and a meso compound)
4 (chiral pairs of cis-trans isomers)
2 (a pair of configurational isomers)
1
Which statement most closely defines the term "meso compound"?
a molecule without a plane of symmetry and with chirality centers
a molecule with a plane of symmetry and no chirality center
a molecule without a plane of symmetry and no chirality center
a molecule with a plane of symmetry and chirality centers
a substance that exists as a mixture
Which stereochemical descriptor describes the meso compound of tartaric acid [HOOCCH(OH)CH(OH)COOH]?
(2
S
,3
S
)
(3
S
)
(2
R
,3
S
)
(2
R
,3
R
)
(2
S
)
To separate enantiomers in a solution via chromatography, what material would you use as the "stationary phase"?
a solid phase that has chirality centers and is completely racemic
a solid phase that contains a single enantiomer
a solid phase that contains exactly equal amounts of enantiomers
a solid phase that contains exclusively meso compounds
a solid phase without any chiral centers
Which of the following is a pair of enantiomers?
(2
R
,3
R
)-3-chloro-2-pentanol and (2
R
,3
S
)-3-chloro-2-pentanol
(2
S
,3
R
)-3-chloro-2-pentanol and (2
R
,3
R
)-3-chloro-2-pentanol
(2
S
,3
R
)-3-chloro-2-pentanol and (2
S
,3
S
)-3-chloro-2-pentanol
(2
R
,3
S
)-3-chloro-2-pentanol and (2
S
,3
R
)-3-chloro-2-pentanol
(2
R
,3
S
)-3-chloro-2-pentanol and (2
S
,3
S
)-3-chloro-2-pentanol
Why does a racemic mixture
not
rotate plane-polarized light?
For every molecule that rotates the plane in one direction, there is a mirror image molecule that rotates the plane in the same direction.
They form opaque solutions.
For every molecule that rotates the plane in one direction, there is a mirror image molecule that rotates the plane in the opposite direction.
It contains only chiral molecules in the
S
configuration.
It contains only chiral molecules in the
R
configuration.
If an OH group were placed on each of the five carbons of pentane, how many stereoisomers would be possible for this compound and how many of these would be optically active?
7 stereoisomers; 6 would be optically active
4 stereoisomers; 2 would be optically active
4 stereoisomers; 3 would be optically active
5 isomers; 4 would be optically active
8 stereoisomers; all would be optically active
If (
R
)-2-methyl-1-butanol has a specific rotation of +5.75°, what is the specific rotation of
S
-2-methyl-1-butanol?
+5.75°
It must be experimentally determined.
-5.75°
+4.25°
0°
Which of the following is
not
a true statement?
a: Specific rotation is independent of concentration.
b: Specific rotation is independent of light path of the polarimeter.
c: Observed rotation is independent of concentration.
d: Observed rotation is independent of light path of the polarimeter.
c and d
What is the relationship between configuration and optical rotation?
R
compounds always are levorotatory.
R
compounds usually are levorotatory with few exceptions.
R
compounds usually are dextrorotatory with few exceptions.
R
compounds always are dextrorotatory.
There is no relationship.
What is the maximum number of stereoisomers possible for a compound with five chirality centers?
5
10
25
32
64
The Clear Answers feature requires scripting to function. Your browser either does not support scripting or you have turned scripting off. So, the Clear Answers feature will not work. Note that you do not need to use the Clear Answers feature in order to use this site. You can change your answers for each question individually.
Your browser either does not support scripting or you have turned scripting off. Because of this, the answer choices will NOT appear in a different order each time the page is loaded, though that is mentioned below. Note that you do not need this feature to use this site.
Answer choices in this exercise appear in a different order each time the page
is loaded.
Copyright © 1995 - 2021
Pearson Education
. All rights reserved. Pearson Prentice Hall is an imprint of
Pearson
.
Legal Notice
|
Privacy Policy
|
Permissions
[Return to the Top of this Page]
: return
