Alkenes and Alkynes: Double and Triple Bonds

                   

                                       Alkenes and Alkynes: Double and Triple Bonds

          Today in chemistry class, we learned about double and triple bonds with Carbon atoms.

1. Carbon can form double and triple bonds with Carbon atoms. When multiple bonds form, fewer Hydrogens are attached to the carbon atom. Naming rules are almost the same as with alkanes.

• The position of the double/triple bonds always has the lowest number and is put in front of the parent chain.

• Double bonds (Alkenes) end in -ene. Triple bonds (Alkynes) end in -yne.

          Ex.

    
     


   Ex.     

                                                                     

EX:

What is the name of this alkene?

What is the name of this alkyne?

Multiple Double Bonds:

More than one double bond can exist in a molecule. Use the same multipliers inside the parent chain.

Trans and Cis Butene:

If two adjacent carbons are bonded by a double bond and have side chains on them two possible compounds are possible.