Chem 334 - Summer 1998 - Organic Chemistry I Dr. Carl C. Wamser

Pre-Quiz 5 (Chapter 5.1 - 5.8)

1. (1 pt) Molecules that exist as mirror-image isomers are called

enantiomers

2. (1 pt) 2-Chlorobutane can exist as mirror-image isomers because of the existence of a stereocenter in the molecule. Write the structure of 2-chlorobutane and identify the atom that is the stereocenter.

3. (2 pts) Which of the structures below represents the same molecule as the first structure? Circle those that are the same as the first.

 

4. (1 pt) Describe what is meant by optical activity.

Optical activity is the ability of chiral molecules to rotate the plane of plane-polarized light.