Chapter 5: Stereochemistry

Question 1

What is true about enantiomers regarding polarized light?

Answer 1

They rotate it the same amount, but in opposite directions

Question 2

What is important about molecule position when determining R/S configuration?

Answer 2

The lowest priority group faces backwards (usually H)

Question 3

How can configuration be determined if the lowest priority is not facing away?

Answer 3

The direction can be inverted

Question 4

What are diastereomers?

Answer 4

Two molecules with the same connectivity that have different stereochemistry and are not enantiomers

Question 5

How many diastereomers exist for a certain molecule?

Answer 5

2^n where n is the amount of stereocenters

Question 6

What is a (E) isomer?

Answer 6

The two highest priority groups are on the opposite side of the double bond

Question 7

What is a (Z) isomer?

Answer 7

The two highest priority groups are on the same side of the double bond

Question 8

How is the order of R/S determined with naming?

Answer 8

IUPAC ordering of carbons, or alphabetical order