225系统命名法 IUPAC命名法, International Union of Pure and applied chemistry 1.选取含碳原子最多支链数目最多的碳链为主链;当最长碳链有 多种时,选支链最多者为主链: HoC-CHb-CH-CH-CH-CH-CH CH-CH,CH CH2亿H HC-CH CH-CH H3C-CH2CH-CH-CH2-CH3 rganIc C emIstry2.2.5 系统命名法 IUPAC命名法, International Union of Pure and Applied Chemistry 1.选取含碳原子最多支链数目最多的碳链为主链；当最长碳链有 多种时，选支链最多者为主链： H3 C CH2 CH CH2 CH CH3 CH2 CH3 CH2 CH2 CH3 H3 C CH2 CH CH CH2 CH3 H3 C CH CH CH3 CH3 CH3