Chem 336 - Spring 2000
Organic Chemistry III
Dr. Carl C. Wamser

Chapter 22 Pre-Quiz

1. How many pi molecular orbitals (including bonding, nonbonding, and antibonding) are expected for 1,3,5-hexatriene?

a) 2

b) 4

c) 6

d) can't tell

e) none of the above

2. Assuming that both 1,2- and 1,4-addition take place, the addition of HBr to 1,3-cyclohexadiene would be expected to give two different products that are

a) enantiomers

b) diastereomers

c) cis-trans isomers

d) constitutional isomers

e) none of the above

3. The compound below that could NOT easily be made by a Diels-Alder reaction is

a) cyclohexene

b) 1,3-cyclohexadiene

c) 1,4-cyclohexadiene

4. A Claisen rearrangement typicallyforms

a) a phenol

b) a conjugated alkene

c) a diene

d) a ring

e) none of the above

5. In photodynamic therapy the therapeutic effect is caused by

a) light

b) cancer cells

c) singlet oxygen

d) free radicals