Organic Chemistry I

Chem 334 - Fall 2009

Pre-Quiz 7

Professor Carl C. Wamser

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Your answers must be submitted before 8:30 am, Fri, Nov 6

1. The only compound in the list below that has a chirality center is

a. 2-methylpentane
b. 3-methylpentane
c. 2-methylhexane
* d. 3-methylhexane
e. methylcyclohexane

2. (R,R)-1,2-dimethylcyclohexane would be

a. cis
* b. trans
c. can't tell

3. When HI adds to 1-pentene, the 2-iodopentane product will be

a. all (R)
b. all (S)
c. achiral
* d. racemic
e. can't tell

4. If optically pure (S)-2-butanol has a specific rotation of +13.5°, then a sample of 50% optically pure (S)-2-butanol would be expected to have a specific rotation of

a. -6.75°
* b. +6.75°
c. -13.5°
d. -27°
e. 0°

5. An example of a meso compound is

* a. cis-1,2-dichlorocyclobutane
b. trans-1,2-dichlorocyclobutane
c. cis-1,3-dichlorocyclobutane
d. trans-1,3-dichlorocyclobutane
e. none of the above