Alkenes, Alkynes, who cares? They're the same thing.
Even though they both form bonds that contain fewer Hydrogen atoms attached to Carbon atoms, THEY ARE VERY DIFFERENT!
Naming these compounds are relatively easy, as they follow the same rules as naming Alkanes. Just remember to change the ENDING to the appropriate one!
Let's start with Alkenes.
Alkenes-->contain one or more double bonds
-->classified as unsaturated hydrocarbons
-->CHANGE ENDING TO "-ENE"
*notice how the ending of the parent chain changed
Alkenes have a many possible structures (same), BUT have different geometrical shape
-->this is special to ONLY ALKENES called geometric insomers
Geometric insomers-->occur when double bond is formed, having side chains attached (top & bottom)
-trans: (top&bottom, bottom&top)
-cis: same side (top&top, bottom&bottom)
So, practice what you've learned!
Draw these structures:
Now, for the Alkynes!
Alkynes-->contain one or more triple bonds (yes, now you use 3 LINES!!)
-->also unsaturated hydrocarbons
-->naming rules are still the same, but CHANGE ENDINGS to "-YNE"
eg. CH3-CH-CH3-C(insert triple bond here)C-CH3
Make sure you do some extra practice from the textbook!!
Memorize all the prefixes (it'll help)!