The document provides an overview of hydrocarbons, specifically focusing on alkanes, alkenes, and alkynes, explaining their formulas, bonding types, and naming conventions. It outlines the characteristics of saturated hydrocarbons (alkanes) and unsaturated hydrocarbons (alkenes and alkynes), detailing how to determine their structural formulas and naming based on carbon chains. Key points include the significance of prefixes for carbon counts and the impact of substituent groups on boiling points.

1. Regents Chemistry
Unit 7- Organic
Hydrocarbons:
Alkanes, alkenes,
and alkynes
Day 2

2. Hydrocarbons-
contain only
carbon and
hydrogen

3. Table Q- Extremely useful… use it!!

4. 1. C4H6
3. C12H26
2. C6H12
Alkanes
Alkenes
Alkynes

5. Alkanes
Saturated hydrocarbons- full of Hs
(only single bonds)
More carbons= higher boiling pt
More substitute groups = lower boiling
point.
If the compounds have same amount of
Carbon
C H

6. Whiteboard question:
•What is the formula for
octane
• Draw octane

7. • 1. Memorize Prefixes
• 2. if single bond (alkane) – suffix = ane
if double bond (alkene) – suffix = ene
if triple bond (Alkyne) – suffix = yne
• 3. find the longest chain (the most amount of Carbon) = Main Chain
• 4. Giving number of Carbon at the Main Chain
• 5. Giving name of the substitute groups (if there is any)
• 6. giving COMPLETE NAME of HC
write number of substitute groups first – name of substitute groups –
Name of main Chain
HOW TO GIVE NAME OF HYDROCARBON

8. Remaind these!
Amount of carbon is showing by these prefixes

9. Branch

10. 1.
2.

11. Alkenes (used to make plastics)
•Must contain at least one
double covalent bond
•CnH2n
•Unsaturated due to the =
double bond
•Why isn’t there a
methene?

12. •What is the formula for hexene?
•Draw hexene.

13. Alkynes- includes ethyne (acetylene for welding)
•Unsaturated due to the triple bond
•Must have at least one triple bond
•Formula is CnH2n-2
•does
methyne exist?

14. •What is the formula for
3-heptyne?
•Draw 3-heptyne