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Ch04Q4.docx
Ch04Q4.docx
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Ch04Q4.docx-Draw the Newman projection for the
Ch04Q4.docx-Draw the Newman projection for the
Ch04Q4.docx-Draw the Newman project...
Ch04Q4.docx-Draw the Newman projection for the
Page 1
1.
Draw the Newman projection for the eclipsed conformation of propane.
Ans:
Topic: Conformational Analysis of Ethane/Propane
Section 7
Difficulty Level: easy
2.
Which of the following is/are a Newman projection of an eclipsed conformer?
Ans: C
Topic: Conformational Analysis of Ethane/Propane
Section 7
Difficulty Level: easy
3.
Which of the following is/are a Newman projection of a staggered conformer?
Ans: A or D
Topic: Conformational Analysis of Ethane/Propane
Section 7
Difficulty Level: hard
4.
Draw an energy diagram for the conformational analysis of propane.
Page 2
Ans:
Topic: Conformational Analysis of Ethane/Propane
Section 7
Difficulty Level: hard
5.
What is the eclipsing cost of Br and H if the energy difference between
the staggered and eclipsed conformations of bromoethane is 13 kJ/mol?
Ans: 5 kJ/mol
Topic: Conformational Analysis of Ethane/Propane
Section 7
Difficulty Level: hard
6.
What is the energy difference between the staggered and eclipsed
conformations of 2,2,-dimethylpropane if the eclipsing cost of Me and H is 6
kJ/mol?
Ans: 18 kJ/mol
Topic: Conformational Analysis of Butane
Section 8
Difficulty Level: easy
7.
Which of the following is a gauche conformer?
Ans: A
Topic: Conformational Analysis of Butane
Section 8
Difficulty Level: easy
Page 3
8.
Which of the following is an
anti
conformer?
Ans: D
Topic: Conformational Analysis of Butane
Section 8
Difficulty Level: hard
9.
Draw the Newman projection of the conformer of the following compound where the
two methyl groups are
anti
.
Ans:
Topic: Conformational Analysis of Butane
Section 8
Difficulty Level: hard
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