CH CH CH CH.CH2CH2÷ and CH:CHCH Propane Propyl Isopropyl CH CH2CH2CH CH;CH2CH2CH2 and CHaCH2CHCHg Butane Butyl sec-Butyl C CHg CH CHCHs CH,CHCH2专 and CHa-C Isobutane Isobutyl CHa tert-Butyl 2004 Thomson-Brooks/Cole