1 - Isomerism

Question 1

What are the two types of isomer?

Answer 1

• Structural
• Stereoisomers

Question 2

What is a structural isomer?

Answer 2

Compounds with the same molecular formula but different structures

Question 3

What are the three types of structural isomer?

Answer 3

• Chain isomer
• Positional isomer
• Functional group isomer

Question 4

What is a chain isomer?

Answer 4

Same molecular formula but carbon chains are arranged differently

Question 5

Example of chain isomer

Question 6

What is a positional isomer?

Answer 6

Same molecular formula but functional group attached in a different place

Question 7

Example of positional isomer

Question 8

What is a functional group isomer?

Answer 8

Same molecular formula but atoms are rearranged to give a different functional group

Question 9

Example of functional group isomer

Question 10

What is a stereoisomer?

Answer 10

Compounds with the same structural formula but with a different spatial arrangement

Question 11

What are the two types of stereoisomers?

Answer 11

• E/Z isomerism
• Optical isomerism

Question 12

What does E/Z isomerism tell us?

Answer 12

The positions of atoms on either side of a C=C double bond

Question 13

What does it mean if there is a (Z) in front of a named molecule?

Answer 13

Both atoms are on the same side of the C=C double bond

Question 14

What does it mean if there is an (E) in front of a named molecule?

Answer 14

Atoms are on opposite sides of the C=C double bond

Question 15

What is the Cahn-Ingold-Prelog priority rules?

Answer 15

Atoms with a higher Ar bonded to each carbon atom of C=C will have priority