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1 | |
Enantiomers are? |
| | A) | Structural isomers. |
| | B) | Conformational isomers. |
| | C) | Geometrical isomers. |
| | D) | Stereoisomers. |
| | E) | Nonsuperimposable mirror images. |
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2 | |
Is the following molecule chiral?
 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0072828374/211137/7_2.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (12.0K)</a>]]> |
| | A) | Yes. |
| | B) | No. |
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3 | |
A stereogenic center is not? |
| | A) | A chiral center. |
| | B) | An asymmetric center. |
| | C) | A carbon atom with four different substituents. |
| | D) | An asymmetric carbon atom. |
| | E) | A carbon atom bisected by a mirror plane. |
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4 | |
The amount of the major enantiomer in a solution which is 80% optically pure is? |
| | A) | 50% |
| | B) | 60% |
| | C) | 70% |
| | D) | 80% |
| | E) | 90% |
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5 | |
Which statement does not apply to optical rotation? |
| | A) | dextrorotatory (d) compounds rotate light clockwise. |
| | B) | levorotatory compounds rotate light (-). |
| | C) | Specific rotation is directly proportional to the observed rotation. |
| | D) | Specific rotation is directly proportional to the concentration. |
| | E) | dl compounds are meso. |
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6 | |
Assign the absolute configuration to:
 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0072828374/211137/7_6.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (12.0K)</a>]]> |
| | A) | R |
| | B) | S |
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7 | |
Assign the absolute configuration to:
 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0072828374/211137/7_7.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (12.0K)</a>]]> |
| | A) | R |
| | B) | S |
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8 | |
Assign the absolute configuration to:
 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0072828374/211137/7_8.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (15.0K)</a>]]> |
| | A) | R |
| | B) | S |
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9 | |
Diastereomers are? |
| | A) | Structural isomers. |
| | B) | Nonsuperimposable non-mirror images. |
| | C) | Geometrical isomers. |
| | D) | Stereoisomers. |
| | E) | Nonsuperimposable mirror images. |
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10 | |
Which compound is the erythro isomer?
 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0072828374/211137/7_10.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (29.0K)</a>]]> |
| | A) | A |
| | B) | B |
| | C) | C |
| | D) | D |
| | E) | E |
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11 | |
Which compound is a meso isomer?
 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0072828374/211137/7_11.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (29.0K)</a>]]> |
| | A) | A |
| | B) | B |
| | C) | C |
| | D) | D |
| | E) | E |
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12 | |
Which compound is the (2S,3S)-2,3-dibromobutane isomer?
 <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=jpg::::/sites/dl/free/0072828374/211137/7_12.jpg','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (29.0K)</a>]]> |
| | A) | A |
| | B) | B |
| | C) | C |
| | D) | D |
| | E) | E |
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13 | |
The configuration of new stereogenic centers
in a reaction is not dependent on? |
| | A) | The stereochemistry of the alkene starting material. |
| | B) | The method of addition, syn verses anti. |
| | C) | The types of steric effects in both the starting material and reagent. |
| | D) | The presence of existing chiral centers in the molecule. |
| | E) | All of the above. |
| | F) | None of the above. |
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14 | |
Chiral resolution refers to? |
| | A) | The identification of the absolute configuration of a chiral center. |
| | B) | The identification of the relative configuration of a chiral center. |
| | C) | The separation of enantiomers based on their chiral properties. |
| | D) | The separation of enantiomers based on their achiral properties. |
| | E) | The separation of enantiomers based on their differing interactions with an optically pure reagent. |
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15 | |
Which of the following is not a stereoregular polymer? |
| | A) | An isotactic polymer. |
| | B) | An atactic polymer. |
| | C) | A syndiotactic polymer. |
| | D) | A cationic polymer. |
| | E) | A coordinate polymer. |
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