Shapes 2 lecture 4

Question 1

entantiomers

Answer 1

Structures that are not superimposable on their mirror image.
have a chiral centre
they are mirror image s
they are not identical
have the same connectivity

Question 2

Chiral molecules

Answer 2

have no plane of symmetry

Question 3

If the connectivity of the atoms in the two isomers is different

Answer 3

they are constitutional isomers.

Question 4

configurations.

Answer 4

they cannot be interconverted without breaking a bond somewhere.

Question 5

conformations

Answer 5

only in the temporary way the molecule happens to arrange itself, and can easily be interconverted just by rotating around bonds.

Question 6

stereogenic

Answer 6

4 groups

Question 7

A racemic mixture

Answer 7

is a mixture of two enantiomers in equal proportions.

Question 8

Is there a chemical difference between two enantiomers?

Answer 8

no

Question 9

Diastereoisomers

Answer 9

are stereoisomers that are not enantiomers

Question 10

the physical and chemical properties of diastereoisomers

Answer 10

differ

Question 11

Diastereoisomers can

Answer 11

be chiral or achiral

Question 12

Diastereoisomers are stereoisomers that

Answer 12

are not mirror images. Two diastereoisomers are different compounds, and have different relative stereochemistry.

Question 13

To go from one diastereoisomer to another, only

Answer 13

one of the two is inverted.

Question 14

meso

Answer 14

has a plane of symetry.