B25
Stadlbauer,
J.M., Venkateswaran, K. and Walker, D.C.
Radiat.
Phys. Chem., 1997,
50, 259.
Reaction:
ClCH2COOH + Mu ®
HMu + ClCHCOOH
ClCH2COOH
+ Mu ®
Cl-
+ m+
+ CH2COOH
Type
of reaction: H atom abstraction and “dechlorination” (atom addition or
electron transfer, followed by dissociation)
kM
= 2.3 x 106 dm3mol-1s-1
at pH = 1.4 – 2 (96.3 %
of undissociated acid)
KIE
= kM / kH = 2.3 x 106 / 2.6 x 105
= 8.8
a)
kH = 2.6 x 105 dm3mol-1s-1
from: Anbar, M. and Neta, P. J. Chem. Soc. A. 1967, 834.
KIE
= kM / kH = 2.3 x 106 / 6.5 x 103
= 300
b)
kH = 6.5 x 103 dm3mol-1s-1
at pH = 0.4 – 2.0 (33%
Cl abstraction)
from:
www.rcdc.nd.edu/compilations/HAtom/H.htm
Depending
on kH accepted KIE varies from ~ 10 to 300. The last value might
indicate different types of reactions for Mu and H
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