432 Nomenclature of the unbranched alkanes 0 Stucture Name CH Methane 123456789 CH3CH3 Ethane CH3CH2CH3 Propane CH3(CH22CH3 Butane CH3(CH23CH Pentane CH3(CH2)4CH3 Hexane CH3(CH2)5CH3 Heptane CH3(CH26CH3 Octane CH3(CH2)7CH3 Nonane 10 CH3 (CH2)8 CH3 Decane4.3.2 Nomenclature of the unbranched alkanes No Stucture Name 1 CH4 Methane 2 CH3 CH3 Ethane 3 CH3 CH2 CH3 Propane 4 CH3 (CH2 ) 2 CH3 Butane 5 CH3 (CH2 ) 3 CH3 Pentane 6 CH3 (CH2 ) 4 CH3 Hexane 7 CH3 (CH2 ) 5 CH3 Heptane 8 CH3 (CH2 ) 6 CH3 Octane 9 CH3 (CH2 ) 7 CH3 Nonane 10 CH3 (CH2 ) 8 CH3 Decane