Alkane Isomers ■ CH4=methane,C2H6=ethane,C3H8=propane The molecular formula of an alkane with more than three carbons can give more than one structure Ca(butane)=butane and isobutane Cs(pentane)=pentane,2-methylbutane,and 2,2- dimethylpropane Alkanes with C's connected to no more than 2 other C's are straight-chain or normal alkanes Alkanes with one or more C's connected to 3 or 4 C's are branched-chain alkanesAlkane Isomers „ CH 4 = methane, C 2 H 6 = ethane, C 3 H 8= propane „ The molecular formula of an alkane with more than three carbons can give more than one structure „ C4 (butane) = butane and isobutane „ C5 (pentane) = pentane, 2-methylbutane, and 2,2- dimethylpropane „ Alkanes with C’s connected to no more than 2 other C’s are straight-chain or normal alkanes „ Alkanes with one or more C’s connected to 3 or 4 C’s are branched-chain alkanes