The oxidation of phenol by ferrate(VI) and ferrate(V). A pulse radiolysis and stopped-flow study.
Potassium ferrate, K2FeO4, is found to oxidize phenol in aqueous solution (5.5 < or = pH < or = 10) by a process which is second order in both reactants; -d[FeVI]/dt=k1[FeVI][phenol], k1 = 10(7)M-1s-1. Product analysis by HPLC showed a mixture of hydroxylated products, principally paraquinone, and biphenols that indicate that oxidation of phenol occurs by both one-electron and two-electron pathways. The two-electron oxidant, producing both para- and ortho-hydroxylated phenols is considered to be ferrate(V) which is itself produced by the initial one-electron reduction of ferrate(VI). The rate of ferrate(V) reaction with phenol was determined by pre-mix stopped flow pulse-radiolysis and found to be k7 = (3.8 +/- 0.4) x 10(5)M-1s-1.
Rush
J D
JD
Chemistry Department, Brookhaven National Laboratory, Upton, N.Y. 11973-5000, USA.
Cyr
J E
JE
Zhao
Z
Z
Bielski
B H
BH
D001713:Biphenyl Compounds / Q000378:metabolism; D002851:Chromatography, High Pressure Liquid; D004305:Dose-Response Relationship, Drug; D058085:Iron Compounds / Q000378:metabolism*; D007700:Kinetics; D008956:Models, Chemical; D010084:Oxidation-Reduction; D010636:Phenols / Q000378:metabolism*; D017680:Potassium Compounds / Q000378:metabolism*; D011675:Pulse Radiolysis; D011809:Quinones / Q000378:metabolism; D013053:Spectrophotometry
D001713:Biphenyl Compounds; D058085:Iron Compounds; D010636:Phenols; D017680:Potassium Compounds; D011809:Quinones; C044384:potassium ferrate