Organic Chemistry 354 Quiz - November 24, 1999
Dr. Sundin
- 1. The Fischer Projection of D-glyceraldehyde is shown below.
- Encircle the following structures which are D-glyceraldehyde:
Answer
- 2. Pyrrole has a dipole moments of 2.2 Debye. While the dipole moment
is fairly easily measured in the laboratory, the measurement does not tell
us the direction of the dipole moment. One is tempted to put the negative
end of the dipole moment close to electronegative nitrogen, but resonance
theory and the measurement of the dipole moments of substituted pyrroles
indicate that the positive end of the dipole moment is close to the nitrogen
atom. Give two other reasonable resonance contributors of pyrrole which
tells us the direction of the dipole moment.
Answer
- 3. Give the letter of a structure below which is a(n)
- a. aldohexose
Answer
- b. ketopentose
Answer
- c. a D-hexose
Answer
- d. Oxidation gives an optically inactive diacid
Answer
- 4. In each of the following, encircle the stronger base:
- Answer A
- Answer B
- Answer C
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