Perhydroxide anion

The mechanism of activation is believed to be as follows. In an alkaline medium, hydrogen peroxide yields the perhydroxide anion (Scheme 10.22), which reacts with TAED (10.86) to form diacetylethylenediamine (10.87) and the peracetate anion (10.88) as in Scheme 10.30 [244]. At pH 8-9, the peracetate anion is in equilibrium with free peracetic acid, as in Scheme 10.31 [244]. The peracetic acid reacts with the peracetate anion to form nascent oxygen which is the active bleaching agent, as in Scheme 10.32 [244]. Further possible activators suggested by Kleber [244] include ... 

Under alkaline conditions, H202 produces perhydroxide anion, which playing the role of the intermediate substance epoxidizes a-unsaturated ketones and interacts with nitriles giving amides and 02 [59], In the two latter cases, the perhydroxide anion helps in setting the inter-reaction communication required for conjugation. 

In an alkaline medium, the perhydroxide anion of the peroxide bleach [51] that predominates in Europe is formed as an active intermediate from hydrogen peroxide ... 

Dissolution of perborate in the wash bath principally delivers the perhydroxide anion, although peroxoborate species will also be present. The level of the latter depends on the pH of the wash bath and the concentration of persalt used [9-11]. These species may also take part in the bleaching process. 

Under alkaline conditions, 1 mol of TAED reacts with two moles of perhydroxide anion to form 2 mol of peracetic anion (Fig. 4). The residue is diacetyl ethylene diamine (DAED). The remaining two acetyl groups on DAED cannot be displaced by pefoxiae in the wash bath and this biodegradable residue is discharged from the washing machine. The mechanism of reaction is via nucleophilic attack by the perhydroxide anion and is typical of that of imides. 

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