Hydrocarbons Hydrocarbons are molecules that are made of carbon and hydrogen ONLY. TABLE 3-1 Hydrocarbon Classifications Compound Type Functional Group Example alkanes none (no double or triple bonds) CH3-CH2-CH3,propane alkenes C=C double bond CH2=CH-CH3.propene alkynes -C=C-triple bond H-C=C-CH3.propyne CHCH, aromatics benzene ring ethylbenzene Copyright 2010 Pearson Prentice Hall,Inc. Chapter 3 2 Chapter 3 2 Hydrocarbons are molecules that are made of carbon and hydrogen ONLY. Hydrocarbons