Steroeisomers

Question 1

What do stereoisomers have?

Answer 1

Same structural formula
Different arrangement of the atoms in space

Question 2

When does E/Z isomerism occur?

Answer 2

In compounds with C=C double bond

Question 3

When can optical isomerism occur?

Answer 3

Much wider range of compounds- including alkanes with no functional groups

Question 4

How does stereoisomerism around double bonds arises?

Answer 4

Rotation around the double bond is restricted and the groups attached to each carbon atom are therefore fixed relative to eachother

Question 5

What is the rigidity for the double bond?

Answer 5

The position of the pi bond’s electron density above and below the plane of the sigma bond

Question 6

When is a molecule an EZ isomer?

Answer 6

When there is a C=C double bond
Different groups are attached to each carbon atom of the double bond

Question 7

What is cis-trans isomerism?

Answer 7

Molecules must have a C=C double bond
One of the attached groups on each carbon atom of the double bond must be the same

Question 8

What happens if the groups of higher priority are on the same side of the double bond?

Answer 8

The compound is the z isomer

Question 9

What happens if the groups if higher priority are diagonally placed across the double bond?

Answer 9

The compound is the E isomer