Ethanol, absolute, preparation peroxide

Reactivity of (HPS)VO(OH). A variety of coordination complexes catalyze the oxidation of bromide by hydrogen peroxide. The first and most studied catalyst is the hydroxooxovanadium(V) complex of hydrox-yphenylsalicylideneamine (H2HPS, shown in Figure 4) (35). The proposed mechanism is shown in Scheme 3. The catalyst precursor is the crystalline (HPS)VO(OEt)(EtOH) compound, which is readily prepared from VO(iOPr)3 and H2HPS (36) in absolute ethanol. Dissolution of this solid in N,N-dimethylformamide (DMF) gives rise to five species (HPS)VO(OEt), the active catalyst (HPS)VO(OH), and three stereochemically distinct di-... 

CN is prepared by dissolving 40 mg in 0.2-0.5 ml of absolute ethanol. While stirring, 100 ml of 50 mM Tris-HCI buffer, pH 7.6, and 10-100 pi of 30% peroxide are added. Usually a white precipitate forms which is removed by filtration. Heating the incuba-... 

Ethoxyethylperoxyls were prepared by a variety of methods and react to give ethyl acetate, ethanol, acetaldehyde and ethyl formate. (Table V). There was no evidence for the formation of di-(1-ethoxyethyl) peroxide, a result that is not entirely incompatible with Diaper s work in view of the large difference in the size the peroxy radicals studied by the two groups of workers. The absolute yields of the products were difficult to ascertain with any degree of certainty because of secondary reactions. The high yield of ethyl formate is, however, diagnostic for the intermediacy of alkoxy radicals and indicates that at least 20 of the self-reactions of 1-ethoxyethylperoxyls occur via the radical mechanism. 

---