OCHEM Exam 3

OCHEM Exam 3

University

25 Qs

quiz-placeholder

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OCHEM Exam 3

OCHEM Exam 3

Assessment

Quiz

Chemistry

University

Easy

Created by

Victoria Garcia

Used 2+ times

FREE Resource

25 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

which of the following does not apply to the compound shown above?

it has (R) configuration

it could either be dextrorotatory or levorotatory

it is a chiral compound

it has an enantiomer

it is optically active

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

predict the specific rotation of cis-1,4-dimethylcyclohexane

because this compound represents a racemic mixture, the compound is dextrorotatory

zero; the compound is achiral

because both asymmetric centers are R, the compound is dextrorotatory

because both asymmetric centers are S, the compound is levorotatory

it is impossible to predict; it must be determined experimentally.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

  • the specific ration of (S)-2-iodoobutane is +15.90. what is the % composition of a mixture of (R) and (S)-2-idodobutane with a specific ration of -7.95?

A. 48% (R) and 25% (S)

B. 75% (R) and 25% (S)

C. 76% (R) and 24% (S)

D. 25% (R) and 75% (S)

E. 24% (R) and 76% (S)

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

how many stereoisomers are possible for the molecule shown below?

194

128

132

228

256

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Sn2 Reactions usually proceed with ____.

slightly more inversion that retention at the center undergoing substitution

complete inversion at the center undergoing substitution

slightly more retention than inversion at the center undergoing substitution

equal amounts of inversion and retention at the center undergoing substitution

complete retention at the center undergoing substitution

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

what is the correct name of the following structure?

A. (2R, 3R)-2-bromo-3-chlorobutane

B. (2S, 3S)-2-bromo-3-chlorobutane

C. (2R, 3S)-2-bromo-3-chlorobutane

D.(2S, 3R)-2-bromo-3-chlorobutane

none of the above

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

which of the following statements correctly describes E1 reactions of alkyl halides (RX)?

Both II and IV

III, IV, and V

III only

I, IV, and V

I, III, V

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