Structural Isomers

What are isomers?

• Molecules with different molecular formulas

• Molecules with the same molecular formula but different arrangement of atoms

• Molecules with the same arrangement of atoms

• Molecules with different chemical properties

What is structural isomerism?

• Isomers with different functional groups

• Isomers with the same carbon skeleton but different arrangement of atoms

• Isomers with different molecular formulas

• Isomers with the same arrangement of atoms

What is the difference between structural isomers and molecules that are simply rotated?

• Structural isomers have the same arrangement of atoms

• Structural isomers have different arrangement of atoms

• Structural isomers have the same molecular formula

• Structural isomers have different chemical properties

What is chain isomerism?

• Isomers with the same arrangement of atoms

• Isomers with different functional groups

• Isomers with the same carbon skeleton but different arrangement of atoms

• Isomers with different molecular formulas

What is position isomerism?

• Isomers with the same carbon skeleton but different arrangement of atoms

• Isomers with different molecular formulas

• Isomers with different functional groups

• Isomers with the same arrangement of atoms

What is functional group isomerism?

• Isomers with different functional groups

• Isomers with the same arrangement of atoms

• Isomers with the same carbon skeleton but different arrangement of atoms

• Isomers with different molecular formulas

How many chain isomers does butane (C4H10) have?

• One

• Four

• Two

• Three

How many position isomers does C3H7Br have?

• One

• Four

• Two

• Three

What are the structural isomers of C3H6O?

• Propanal and propanone

• Propanal and propanoic acid

• Propanone and propanoic acid

• Propanal, propanone, and propanoic acid

What is important to consider when drawing structural isomers from a given molecular formula?

• Only consider chain isomers

• Only consider position isomers

• Consider all possibilities including branching the carbon chain and moving groups around

• Consider only functional group isomers