ORGANIC CHEMISTRY Chapter 13 CH2-CH2 入max(nm)17 177 178 182 184 185 max(nm)217 223 223.5 228 274 239 256 Department of Chemistry, Xiamen UniversityORGANIC CHEMISTRY Department of Chemistry, Xiamen University Chapter 13 CH2 CH2 171 184 177 182 185 λmax (nm) 178 217 223 228 274 239 256 λmax (nm) 223.5