Isomerism in Organic Compounds

Friday- Unit 11: Isomers, alkenes, alkynes

Announcements/Reminders

Agenda:

​

• Thurs 5/5 Unit 12 test​

• Wed 5/10 Benchmark 4 test​

• Fri 5/12 PLD

• Final exam- 5/24 & 5/25

• Last day of school 5/30

• 18 school days until final exam!​

• Alkane isomers

• alkenes​, alkynes

Bellwork:

On GC​​

Multiple Choice

Atoms can form double or triple ______depending on whether they share two or three pairs of electrons.

• Molecules

• Bonds

• Compounds

• Elements

Multiple Choice

What type of bond is shown between the 2 carbons?

• single

• double

• triple

• ionic

Multiple Choice

What type of bond is shown between the 2 carbons?

• single

• double

• triple

• ionic

​

​4TH PAGE IN PACKET

​Rules for Naming Branching Alkanes

​1. Find the longest continuous chain (it does NOT have to be straight!)

​

    CH3

                        |

            CH3–CH2–CH–CH2–CH2–CH3

​

​

​

Rule 3

If there is more than one identical

substituent the number of

substituent is indicated by using

prefixes –di, –tri, –tetra and so on.

Rule 4

When two or more different

substituents are bonded to the

carbon chain, they are ordered

alphabetically.

Groups

• Cl - chloro

• Br - bromo

• CH₃ - methyl

• C₂H₃C₂H₂- ethyl

Multiple Choice

How many hydrogen atoms are in pentane?

• 3

• 5

• 10

• 12

What numbers should replace the crossed out ones?

​https://www.stolaf.edu/depts/chemistry/courses/toolkits/247/js/names/dnames.htm

​

​https://www.stolaf.edu/depts/chemistry/courses/toolkits/247/js/names/dnames.htm

Multiple Choice

Hydrocarbons are compounds that contain

• Carbon, only

• Carbon and Hydrogen, only

• Carbon, Oxygen, and Hydrogen, only

• Carbon, Oxygen, Hydrogen, and Nitrogen, only

Multiple Choice

What class of hydrocarbon is this?

• alkane

• alkene

• alkyne

Multiple Choice

Classify the compound based on the type of bond present.

• alkane
• alkene
• alkyne
• aromatic

Multiple Choice

• 1-propene

• 2-propyne

Multiple Choice

Is the name of single bonded, saturated hydrocarbons.

• Alkanes

• Alkenes

• Alkynes

• Tanins

Multiple Choice

Is the name of doubled bonded, unsaturated hydrocarbons.

• Alkanes

• Alkenes

• Allkynes

• Tanins

Multiple Choice

Is the name of triple bonded, unsaturated hydrocarbons.

• Alkanes

• Alkenes

• Alkynes

• Tanins

Multiple Choice

Is the first step to name a Hydrocarbons

• Number the carbons

• Name the branches

• Find the longest/main chain

• Number the branches

Multiple Choice

Name of the type of formula shown in the image.

• Condensed Formula

• Structural Formula

• Line Diagram/Skeletal Formula

Multiple Choice

ALKENES have

• Only single bonds

• At least one double bond

• All double bonds

• At least one triple bond

Multiple Choice

ALKYNES are unsaturated hydrocarbons that have at least one triple bond.

• True

• False

Multiple Choice

Molecules with the same formula but different structures are known as:

• ions
• isomers
• isotopes
• ionic bonds

Multiple Choice

Is the name of the representation showed in the image.

• Line Diagram/Formula

• Condensed Formula

• Structural Formula

Multiple Choice

Is a characteristic of alkynes

• Triple Bonded

• Double Bonded

• Single Bonded

• Saturated

Multiple Choice

Changes in the structure of the carbon chain can completely change the chemistry of the molecule

• True

• False

Multiple Choice

Is the simplest alkane

• Ethane

• Methane

• Propane

• Decane

Multiple Choice

The longer the hydrocarbon, the _______ the boiling point

• Lower
• Higher

Multiple Choice

Name the compound.

• hexane
• 2,3-dimethylbutane
• ethylbutane
• 2,2-dimethylbutane

Pages 7-9 in packet

Some text here about the topic of discussion