Table 4: Effect of substituent on the rate of oxidation of 5-oxoacids by perborate at 313 ± 0.1 K. {[Substrate] = 0.01 mol dm−3; [perborate] = 0.001 mol dm−3; [H2SO4] = 2.0 mol mol−3; HOAC-H2O = 1 : 1% v/v}.

Substituent ( )5 + log k

p-OCH3−0.27−0.78191.82.2829
p-CH3−0.17−0.3126.91.4293
p-C6H5−0.11−0.2218.81.2623
−H0.000.0012.81.1070
p-Cl0.230.114.30.6299
p-Br0.430.382.70.3470
m-NO20.710.671.50.1802