Naming Rings, Alkenes and Alkynes

Alkenes

Alkenes: Double bonded carbonEnding: ene

Name: Use the same four stepsChanges: Carbon 1 is closest to the alkene

Alkenes

1) Find the largest chain that includes the alkene

2) Put in the ene ending instead of ane3) Number the carbons 1-4 with 1 closest to

alkene

Alkenes

1) Find the largest chain that includes the alkene

2) Put in the ene ending instead of ane3) Number the carbons 1-4 with 1 closest to

alkene

1-butene

A Branch and an Alkene1) Find the longest chain with the alkene butene2) Count the carbons starting with the closest one to the

alkene 1-butene3) Add in the branch 2-ethyl-1-butene

Alkyne

Exactly the same as with alkene

Carbon rings (not aromatics)Same steps: 1) Count the carbons2) Number the carbons with the functional group as number

one3) Add the word cyclo in front of the name CH2 – CH2

l l CH2 – C – CH3

l CH3

1-dimethylcyclobutane