.iCLiiufi u-i. i^aiaiyuu
Keto
Transition state
Enol
(a)
H
(c)
c
R
C—05—H5-”A5'
ĆhS"
h5+
ę—o5-
ch2_
h5+
B5*
T
H+
R
T
H+
j-— h2o
Figurę 15-1 Mechanisms of kct<»-cnol tautomcrization. (a) Uncatalyzcd. (b) generał acid catalyzed. and (c) generał base catalyzcd.