Hydrogen Peroxide With a Catalyst

Hydrogen Peroxide With a Catalyst 1. Ferrous Salts 

Addition of a small proportion of iron (II) sulfate to D-tartaric acid-hydrogen peroxide causes rapid conversion into a product closely related to dihydroxymaleic acid. Occurrence of a reaction with substituted hydrazines indicates the presence of a keto acid (1), and isolation of a diacetate and a dibenzoate favors the hypothesis of formation of dihydroxy-fumaric acid (2). On the basis of pH studies, Hatcher and Sturrock  

Spoehr, on the other hand, maintained that four-carbon keto acids, and not D-erythronic acid, are present in the reaction mixture from both d-glucose and D-fructose. Carbon dioxide and formic acid, together with oxalic acid (18-27%), are the result of direct cleavage of ji-erythro-hexoa-2,3-diulose and of D-glycero-h.exoa-2,3,4-triulose, the latter being among the 

Decarboxylation of D-er / /iro-2,3-hexodiulosonic acid (4), arising from D-am6mo-hexulosonic acid (3), gives D-erj/iliro-pentulosonic acid (6), which, in turn, provides D- l2/cero-2,3-pentodiulosonic acid, the latter subsequently being cleaved to oxalic acid and glyceric acid. D-erythro-Hexos-2,3-diulose (5), in similar fashion, yields glyoxylic acid and d-erythronic acid. 

In a kinetic study, Ktichlin found that, with D-fructose, the maximum 

---