Developing Fuels: Isomerism

Question 1

What are 2 types of isomerism

Answer 1

1. Structural Isomerism

2. Stereoisomerism

Question 2

Definition of structural isomerism

Answer 2

Molecules with the same molecular formula but different structural formula

Question 3

Names the 3 types of structural isomerism

Answer 3

1. Chain isomers
2. Position isomers
3. Functional group isomers

Question 4

Definition of chain isomer

Answer 4

Caused by having a different carbon chain

Question 5

Definition of position isomer

Answer 5

Caused by the functional group being in a different position

Question 6

Definition of functional group isomer

Answer 6

Caused my having a different functional group

Question 7

Examples of functional group isomers

Answer 7

1. Alkenes & cycloalkanes
   eg. but-2-ene & cyclobutane
2. Alcohols and ethers
   eg. propan-2-ol & methoxyethane

Question 8

Definition of stereoisomers

Answer 8

Molecules with same structural formula but a different spatial arrangement of atoms

Question 9

Explain why E / Z isomerism is shown in some alkenes

Answer 9

Restricted rotation of bond

Because different groups are attached to the C=C bond

Question 10

Describe a Z stereo isomer

Answer 10

2 same groups in the top

Question 11

Describe a E stereo isomer

Answer 11

2 same groups diagonal to each other