Mechanism of the oscillatory decomposition of the dithionite ion in a flow reactor

Abstract

A simple mechanism consisting of three protonation equilibria and seven redox reactions between sulfur species can describe the large amplitude-sustained temporal pH-oscillations observed during acid-induced decomposition of the dithionite ion in a continuous-flow stirred tank reactor (CSTR) in the temperature range 25-60 degrees C.

The coordination of imidazole and substituted pyridines by the hemeoctapeptide N-acetyl-ferromicroperoxidase-8 (FeIINAcMP8)

“…Dithionite solutions are unstable towards even trace amounts of dioxygen [34,45,56,57] and towards hydroxide [57], and in aqueous solution the SO°2 radical anion disproportionates [58]. As others have done [43,47,59,60], we have used solid sodium dithionite as the reducing agent in this work.…”

Pu(iii) and Cm(iii) in the presence of EDTA: aqueous speciation, redox behavior, and the impact of Ca(ii)

“…4 ). [94][95][96][97] Measured E h values ranged from À0.34 to À0.08 (AE0.05) V for DT-containing experiments and À0.44 to À0.29 (AE0.05) V for Sn(II) containing experiments. WIPP simulated brine solutions equilibrated at pH m z 9.7 and E h z À0.16 V.…”

Dihydronicotinamide riboside: synthesis from nicotinamide riboside chloride, purification and stability studies

“…Therefore, this reaction must be carried out under anaerobic and alkaline conditions. 24,25 At rst, the reaction between NR and S 2 O 4 2À leads to the formation of a sulnate intermediate, which is stable at basic conditions. By protonating this compound, its sulnic acid derivative is formed.…”