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- W2000619502 abstract "The oxidation of d-galactono-1,4-lactone by CrVI yields d-lyxonic acid, carbon dioxide and Cr3+ as final products when an excess of sugar acid over CrVI is used. The redox reaction occurs through CrVI → CrIII and CrVI → CrV → CrIII paths. The complete rate law for the CrVI oxidation reaction is expressed by −d [CrVI] dt = (k0+kH [H+] ) [gal] [CrVI] , where k0 = (31±3) ×10−4 M−1 s−1 and kH = (99±5) ×10−4 M−2 s−1, at 40°C. CrV is formed in a rapid step by reaction of the CO·− 2 radical with CrVI. CrV reacts with the substrate faster than does CrVI. The CrV oxidation follows the rate law : −d [CrV] dt = ( k ′ 0 +k ′ H [H+] ) [gal] , where k ′ 0 = (15±2) ×10−3 M−1 s−1 and k ′ H = (34±4) ×10−3 M−2 s−1, at 40°C. The EPR spectra show that several intermediate [Cr (O) (gala) 2] − linkage isomers are formed in rapid pre-equilibria before the redox steps." @default.
- W2000619502 created "2016-06-24" @default.
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- W2000619502 date "1998-06-01" @default.
- W2000619502 modified "2023-10-16" @default.
- W2000619502 title "Kinetics and mechanism of the oxidation of D-galactono-1,4-lactone by CrVI and CrV" @default.
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- W2000619502 doi "https://doi.org/10.1016/s0277-5387(98)00062-x" @default.
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