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Organic Chemistry I |
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Professor Carl C. Wamser |
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Chapter 3 Pre-Quiz |
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Your answers must be submitted before 8:30 am, Fri., Oct. 7
1. When the torsion angle between two substituents is 60° , the conformation is known as
a. cis
b. trans
c. eclipsed
* d. gauche
e. anti
2. Van der Waals strain refers to strain energy caused by
a. improper bond lenth
b. improper bond angle
c. improper dihedral angle
* d. repulsions between nonbonded atoms
3. Gauche butane is less stable than anti butane by about
a. 0.1 kJ/mol
b. 1 kJ/mol
* c. 3 kJ/mol
d. 10 kJ/mol
4. Bicyclo[4.2.0]octane has the molecular formula
a. C8 H8
b. C8 H10
c. C8 H12
* d. C8 H14
e. C8 H16
5. The most stable conformation of cis-1,4-dimethylcyclohexane has the two methyl groups
a. both axial
b. both equatorial
* c. one axial, one equatorial