Chapter 5

Question 1

Chiral center

Answer 1

Carbon with 4 different groups connected to it

Question 2

Cahn-Ingold-Prelog priority

Answer 2

Based on atomic number follow element through
CO>CH

Question 3

Identifying identical compounds (R/S)

Answer 3

R=clockwise
S=counterclockwise
Assign priority numbers
Rotates from 1 towards 2 through 4

If multiple chiral centers assign 2 R/S designations going from left to right
Ex. RS

Question 4

R/S Exceptions

Answer 4

Lowest priority bolded reverse R/S
Lowest priority top reverse R/S

Question 5

Enantiomer

Answer 5

Compound with same connectivity but different R/S affiliation

Equal magnitude opposite sign

Question 6

Meso

Answer 6

2 chiral centers and a plane of symmetry

Question 7

Relationship between pair of molecules
Identical
Constitutional isomer
Enantiomer
Diastereomer
No relationship

Answer 7

Identical- same connectivity same R/S designation
Constitutional isomer- different connectivity
Enantiomer- same connectivity different opposite R/S designation
Diastereomers- one R/S designation same other different
No relationship- different compounds

Question 8

Stereoisomers given chiral centers

Answer 8

2^n