Organic Chemistry I |
Pre-Quiz 3 |
Professor Carl C. Wamser |
You must log on to Blackboard to submit your answers.
Your answers must be submitted before 8:30 am, Fri, Oct 8
Organic Chemistry I |
Pre-Quiz 3 |
Professor Carl C. Wamser |
You must log on to Blackboard to submit your answers.
Your answers must be submitted before 8:30 am, Fri, Oct 8
1. For butane, the highest-energy eclipsed conformation is how much higher in energy than the lowest-energy conformation?
a. 0
b. 3 kJ/mol
c. 14 kJ/mol
* d. 25 kJ/mol
e. 42 kJ/mol
2. In molecular mechanics, the increase in energy caused by bonds that are twisted from their ideal staggered conformation is called
a. bond stretching strain
b. angle bending strain
* c. torsional strain
d. van der Waals strain
e. hydrogen bonding strain
3. In the best conformation of cis-1,4-dimethylcyclohexane, the two methyl groups will occupy which positions?
a. both axial
b. both equatorial
* c. one axial, one equatorial
4. The molecular formula for bicyclo[2.2.1]heptane would be
a. C5 H12
b. C5 H8
c. C7 H14
d. C7 H16
* e. C7 H12
5. The compound with the higher (more negative delta H) heat of combustion would be
a. cis-1,3-dimethylcyclohexane
* b. trans-1,3-dimethylcyclohexane