ORGANIC CHEMISTRY Chapter 13 ● Cumulated dienes(累积二烯)— The molecules have cumulated double bonds g Isolated dienes(孤立二烯)— one or more saturated carbon atoms intervene between the double bonds of an alkadiene o Conjugated dienes(共轭二烯)— the double and single bonas alternate along the chain C=C C=C=C (CH a cumulated diene A conjugated diene An isolated diene(n+0) Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 13 Cumulated dienes（累积二烯）— The molecules have cumulated double bonds Isolated dienes（孤立二烯）— one or more saturated carbon atoms intervene between the double bonds of an alkadiene. Conjugated dienes（共轭二烯）— the double and single bonds alternate along the chain C C C C C (CH2)nC C C C C C A cumulated diene A conjugated diene An isolated diene (n = 0)