L1 /
12
CH1012
UV SPECTRA TABLES I
1. Dienes, Trienes, etc lmax
e
CH2=CH2
170 16 000
CH2=CH-CH=CH2 217 21
000
CH2=CH-CH=CH-CH=CH2 258 35 000
2. Conjugated carbonyl
cmpds
CH3-C(=O)-CH3
279 15
CH2=CHC(=O)-CH3 213 7
000
320 30
For 1. and 2. extending
conjugation increases lmax (® longer wavelength) and e .
