Chem 334 - Fall 1998 - Organic Chemistry
I Your answers for this pre-quiz must be sent by e-mail
no later than 8:00 am Monday, October 26.
Send your answers to Dr. Wamser at WamserC@pdx.edu
DO NOT use the "Reply" function or your message
will be sent to the
whole class discussion list. Double-check that your message is
addressed to
Dr. Wamser only.
(1 point each question)
1. For the molecules ethane, ethylene, and acetylene, arrange
them in
order of increasing:
a) C-H bond strength
ethane < ethylene < acetylene
b) C-H bond length
acetylene < ethylene < ethane
c) C-C bond length
acetylene < ethylene < ethane
2. How many stereoisomers would be possible for 1,3,5-octatriene?
Name them.
Four
(3E,5E)-1,3,5-octatriene
(3E,5Z)-1,3,5-octatriene
(3Z,5E)-1,3,5-octatriene
(3Z,5Z)-1,3,5-octatriene
3. The following names are unambiguous but are not correct
IUPAC names.
Deduce the compounds to which they refer and give their correct
names.
a) tetramethylethylene
2,3-dimethyl-2-butene
b) (Z)-diisopropyl-2-butene
(Z)-2,3,4,5-tetramethyl-3-hexene
or (Z)-2,7-dimethyl-4-octene is another possibility
4. What does Carl Djerassi believe is one of the most important
contributions of chemistry to society? Explain in your own words.
see your text, pages 181-183, for Carl Djerassi's statement about oral contraceptives
5. What do you think about this type of pre-quiz compared
to the usual
in-class pre-quiz? Did it stimulate you to study the chapter
material
more completely or less completely? Would this type of quiz be
effective for the end-of-chapter quizzes? Why or why not?
student responses to this question will be summarized in class and on the web pages