8.2 Nomenclature of alkenes and cycloalkenes H2C-C CH3 IUPAC Propene common; Propylene H2c=C—cH IUPAC: 2-MethylPropene Common; Isobutylene CH C vcIohexane Cyclohexene 相应的烷-ane变成烯-ene8.2 Nomenclature of alkenes and cycloalkenes H2 C C H CH3 IUPAC: Propene common; Propylene H2 C C CH3 CH3 IUPAC: 2-MethylPropene Common; Isobutylene Cyclohexane Cyclohexene 相 应 的 烷 -ane变 成 烯 -ene