 Alkenes – hydrocarbons containing at least one double bond between carbon atoms  Alkynes – hydrocarbons containing at least one triple bond between carbon atoms  Unsaturated hydrocarbons – they are not loaded to capacity with hydrogens (alkenes and alkynes)  Alkenes formula: C n H 2n  Alkynes formula: C n H 2n-2

 Ethyne (C 2 H 2 ) is emitted by ripening bananas to send a message to the other bananas to ripen.  Ethylene (C 2 H 4 ) is used to ripen fruit.  Why do we put fruit in a paper bag to ripen fruit?  How do shippers keep fruit from ripening too soon?

 Base chain is the longest chain containing the double or triple bond  The base ending is –ene for an alkene and –yne for an alkyne  Base chain is numbered to give the double or triple bond the lowest possible number  A number indicating the location of the double or triple bond is inserted before the base name

 A characteristic atom or group of atoms  A group of organic compounds with the same functional group forms a family

 Organic compounds containing the ―OH functional group  General formula is R-OH  Naming:  Base chain is the longest chain containing the ―OH functional group  Base name ends with ―ol  Base chain is numbered to give the ―OH the lowest possible number  A number indicating the position of the ―OH group is inserted before the base name