Portland State University - - Professor Carl C. Wamser

Chemistry 331 - Fall 1997

Pre-Quiz, Chapter 5



(1 point each)

1. Mirror image isomers (enantiomers) are possible only for carbon atoms with

____ sp3 _______ hybridization.


2. A stereocenter is most easily identified as a carbon bonded to _ 4 different groups _______ .


3. Put the following groups in order of priority:

(Write numbers 1 - 6 under them, where 1 represents highest priority)


4. Write the mirror-image structure for the compound shown below:


5. Mirror-image isomers have identical chemical and physical properties except for their interaction with polarized light. What is the difference they exhibit?

Enantiomers rotate the plane of plane-polarized light equal amounts but in opposite directions, a property called optical activity.