Chapter 2 - Stereochemistry

Question 1

Define an isomer

Answer 1

Two different molecules with the same number and type of atoms

Question 2

Define the difference between structural and functional isomers

Answer 2

Structural isomers: different structure, same formula

Functional isomers: different functional groups

Question 3

Difference between cis and trans

Answer 3

Cis = same, same atom on the top or bottom of the double bond
Trans = different, different atoms on the top or bottom of the double bond

Question 4

Difference between E and Z configuration

Answer 4

E = epposites, high priority on opposite sides of double bond
Z = zame zide, high priority on zame zide of double bond

Question 5

Difference between Achiral and Chiral

Answer 5

chiral = asymmetrical, no mirror image, no line of symmetry
Achiral = symmetrical

Question 6

Difference between enantiomers and disasteromers

Answer 6

Enantiomers are flipped

Disasteromers are half flipped, not symmetrical

Question 7

Difference between R and S configuration

Answer 7

Priority increases clockwise = R

Priority decreases clockwise = S

Question 8

Define meso compound

Answer 8

Meso has minimum 2 chiral centres aand internal mirror plane, is symmetrical