Chem 334 - Fall 1999
Organic Chemistry I

Dr. Carl C. Wamser

Chapter 5 Pre-Quiz Answers

1. Which compound can exist as cis/trans isomers?

a) propene

b) 1-butene

c) 2-butene

d) 1,2-propadiene

e) all of the above

2. In which of the following compounds would you expect ALL of the atoms to lie in the same plane?

a) propene

b) 2-methylpropene

c) 1,2-propadiene

d) all of them

e) none of them

3. The longest C-C bond in 1,3-pentadiene will be found at

a) C1-C2

b) C2-C3

c) C3-C4

d) C4-C5

4. Which name below is a correct IUPAC name?

a) 1,1-dimethylcyclohexene

b) 2-methylcyclohexene

c) 2,3-dimethylcyclohexene

d) cis-4,5-dimethylcyclohexene

e) 5,5-dimethylcyclohexene

5. How many alkenes of molecular formula C5H10 exist that DO NOT show cis-trans isomerism?

a) 0

b) 1

c) 2

d) 3

e) more than 3