Chem 335 - Winter 2002
Organic Chemistry II
Dr. Carl C. Wamser
In order to do this pre-quiz, you must log in to the class WebCT site.
This pre-quiz must be submitted via WebCT before Wednesday morning, January 30, 8:30 am.
1. How many isomers are possible for tribromobenzene ?
1) 1
2) 2
* 3) 3
4) 4
5) 5
2. In the Birch reduction of benzene, what species gets oxidized?
1) benzene
* 2) Na
3) NH3
4) H2O
5) H+
3. A benzylic carbocation involves resonance forms that delocalize the positive charge to
1) ortho and meta positions
* 2) ortho and para positions
3) meta and para positions
4) ortho, meta, and para positions
5) none of the above
4. Which of the following processes could convert 1,3-cyclopentadiene into an aromatic species?
1) adding 2 electrons to the pi* antibonding orbitals
2) removing 2 electrons from the pi bonding orbitals
3) adding H+
* 4) removing H+
5) none of the above
5. An unknown compound, C8H10, is oxidized to benzoic acid by treatment with hot acidic dichromate. The compound must be
1) toluene
* 2) ethylbenzene
3) styrene
4) phenylacetylene
5) p-xylene