(1) The alkyne functional group is the carbon-carbon triple bond.(2) The first step is the addition of the proton to the pi bond of the alkene or alkyne , acting as the electron source.(3) Originally the alkynes were called the acetylenes.(4) By careful use of appropriate conditions and catalysts alkanes can be converted into other hydrocarbons such as the alkenes and alkynes .(5) Alkanes (sometimes called paraffins) have only single bonds, while alkenes (sometimes called olefins) have a carbon-carbon double bond, and alkynes have a carbon-carbon triple bond.
