Bunte salts, hydrolysis

Sodium ethyl thiosulfate [26264-37-9] is also known as Bunte s salt after the name of its discoverer. Bunte salts may be thought of as esters of thiosulfuric acid (94—96). In essentially all of their chemical reactions, the cleavage is between the divalent and hexavalent sulfur atom. For example, acid hydrolysis produces a thiol and the acid sulfate ... 

Other indirect methods are treatment of the halide with silyl-thiols and KH, followed by treatment with fluoride ion and water, and hydrolysis of Bunte salts (see 10-41) is another method. 

Another indirect method is hydrolysis of Bunte salts (see 0-39). 

Comparison of the various mechanistic facets of the above sulfate reactions to those of the acid-catalyzed hydrolysis of the Bunte salts (RSS03 ) suggests that the mechanisms are identical, i.e. A-1163... 

Hydrolysis of the di-Bunte salt derived from 3,3-bis(chIoroniethyl)-oxetane and sodium thiosulfate gave either a tHaulfide or a probable disulfide, depending on conditions. The former, obtained by add hydrolysis of di-Bimte salt contaminated with sodium thioaulfate, wm a colorless crystalline compound, considered to be (LXXVl). The lat ter, from the action of dilute hydrochloric acid on the pure di-Bnnte salt, was a yellow oil which polymerized immediately on distillation and therefore no direct ovidDnoe on He strueturD vrtua obtained, oe... 

Reese and Eyring [45] have demonstrated that the reaction of sulfite with hair is a pseudo-hrst-order reaction. In other words, the chemical reaction of sulfite with the disulfide bond of hair is slower than diffusion of sulfite into hair. Elsworth and Phillips [46, 47] and Volk [48] examined the sulfi-tolysis of keratin, demonstrating that the rate of cystine cleavage is optimal at acid pH. Wolfram and Underwood [49] found a broad optimum for cystine cleavage by sulhte at pH 4 to 6. The decrease in cystine cleavage at acidic pH (below pH 4) is due to a decrease in the concentration of the nucleophilic sulhte species. On the other hand, the decrease in cystine cleavage as pH is raised (alkaline pH) results from alkaline hydrolysis of the Bunte salt [50]. 

---