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

Chapter 20 Pre-Quiz

1. Bromine will not react with benzene unless in the presence of

a) HBr

b) light

c) free radicals

d) FeBr3

e) H2SO4

2. A Friedel-Crafts reaction substitutes what element onto a benzene ring?

a) H

b) C

c) Cl

d) any halogen

e) NO2

3. Nitrobenzene primarily undergoes electrophilic substitution at

a) ortho

b) meta

c) para

d) ortho & para

e) meta & para

4. Nitrobenzene could undergo nucleophilic substitution well if a bromo substituent were located

a) ortho

b) meta

c) para

d) either ortho or para

e) either meta or para

5. Following the benzyne mechanism, o-bromotoluene could give which products upon reaction with NaNH2 ?

a) bromobenzene

b) o-methylaniline

c) m-methylaniline

d) p-methylaniline

e) some other product, or some combination of the above