Y11 COVER Lesson - Isomer

What are you trying to learn today?

• How to define structural isomers.

• What structures always make isomers

• How to draw or determine structural isomers.

• How to solve reactions of structural isomers

• Determine why structural isomers are always carbon based

Which one is butane?

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What is the definition of a structural isomer? Select two.

• Same general formula

• Same molecular formula

• Different molecular formula

• Different structural formula

• Same structural formula

-methyl and ethyl are side carbon side chains. Which is the correct formula for methyl

• -CH2

• -CH3

• -CH2CH3

• -CH4

This is the compound shown in the video. What is its name?
Hint - 1. Find the longest carbon chain. This is the ROOT.

2. 2. Determine the carbon that has the side chains. This is a prefix number.

3. 3. Determine what those side chains are. This goes after the prefix.
   

• 3,3-diethyl-butane

• 3,3-diethyl-pentane

• 3-methyl-3-ethyl-butane

• 3-methyl-3-ethyl-pentane

• 2-methyl-2-ethyl-butane

Structural Isomers will always have different names (if you named it correctly).

• True, they will always have different names because they are connected differently

• False, they can sometimes have the same name depending on how they're connected.

Are these two isomers of each other?

• Yes they are different compounds

• No they are the same compound!

These two drawings are of the SAME molecule. What is the name of this molecule?

• 2-methylbutane

• 3-methylbutane

• 2-ethyl-propane

• butane

Are these two structures isomers?

• Yes they have the same molecular formula but different structural arrangement

• Yes they have the different molecular formula but same structural arrangement

• No they have the same molecular formula but different structural arrangement

• No they have the different molecular formula but same structural arrangement

Are these two isomers of each other?

• Yes, they are isomers of each other. They have the same molecular formula but different names.

• Yes, they are isomers of each other. They have the different molecular formula but same names.

• No, they are NOT isomers of each other. They have the same molecular formula and the same name!

• No, they are NOT isomers of each other. They have the different molecular formula and different names.