ORGANIC CHEMISTRY Chapter 17 Tautomerization(互变异构 OH Acetaldehyde CH2CH、—CH2=CH ( 100%)(extremely smal OH Acetone CH3CCH3 - CH2=CCH3 (>99) (1.5×104%) OH Cyclohexanone (988%) (1.2%) Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 17 Tautomerization (互变异构) CH3CH O CH3CCH3 O O OH CH2 CH OH CH2 CCH3 OH (~ 100%) (extremely small) (> 99%) (1.5×10 %) ( 98.8%) (1.2%) -4 Acetaldehyde Acetone Cyclohexanone