Organic Chemistry I

 

Professor Carl C. Wamser

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