Perborate Oxidation of Substituted 5-Oxoacids in Aqueous Acetic Acid Medium: A Kinetic and Mechanistic Study
Table 2
Effect of varying [H2SO4] on the rate of perborate oxidation of 5-oxoacids at 313 ± 0.1 K. {[Substrate] = 0.01 mol dm−3; [perborate] = 0.001 mol dm−3; HOAc-H2O = 1 : 1% (v/v)}.
[H2SO4] (mol dm−3)
−Ho
()a
p-OCH3
p-CH3
p-C6H5
−H
p-Cl
p-Br
m-NO2
0.51
−0.13
11.89
2.31
1.87
1.58
—
—
—
0.75
0.07
29.93
4.38
3.28
2.88
—
—
—
1.01
0.26
47.98
7.68
5.19
4.52
1.27
1.21
1.18
1.49
0.56
95.96
15.98
12.67
8.84
2.32
1.98
1.26
2.01
0.84
191.9
26.87
19.28
12.78
4.26
3.09
1.52
2.49
1.12
287.9
47.98
38.69
25.59
7.19
5.16
2.57
3.00
1.38
479.8
134.3
79.81
34.85
12.79
7.28
3.97
4.01
1.85
1151
287.8
140.63
57.58
25.58
16.89
7.69
2.01
2.01
2.0
2.00
2.01
2.0
2.00
1.3
1.0
1.0
1.0
1.1
1.1
1.0
Mean of duplicate experiments; bslopes of log k versus log [H2SO4]; cslopes of the Zucker-Hammett plots.
