Alkenes & Alkynes

Fill in the blank to summarize the additional rule that is new for alkenes/alkynes: "You must number the ________"

In numbering an alkene or alkyne, what takes priority (gets the lowest # Carbons)?

• The side chain(s)

• The functional group

Please name the 4 molecules presented above, starting from the top-left and ending on the bottom-right

Answer explanation

Alkynes have the highest melting/boiling points, compared to alkanes and alkenes with the same number of carbons. What explains this?

Why do alkanes have higher melting/boiling points compared to alkenes with the same number of carbons?