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Encyclopedia > Disulphide

In chemistry, a disulfide is an ion formed by sulfur atoms.

Sulfur is usually reduced to a state with oxidation number -2 and forms a S-2 ion, called a sulfide ion, which has the electron configuration of a noble gas (argon).

In some cases it is only reduced to a state with oxidation number -1. Its configuration then resembles that of chlorine and, like it, has the tendency to form a bond with another S- ion to form a disulfide (S2)-2. Oxygen can also do this e.g. in peroxides such as H2O2.

The tendency is a bit more elaborate in the case of sulfur, which can form polysulfides.

See also

  Results from FactBites:
groundWork (398 words)
Carbon disulphide is used in the industrial manufacturing of xanthate intermediates (in the generation of cellulosic products like viscose rayon, and cellophane film), and carbon tetrachloride.
Carbon disulphide is also used in the generation of ore flotation devices, rubber accelerators, and chain transfer agents in polymerization.
Carbon disulphide is still used for the extraction of fats, oils and waxes, but is being replaced more and more by less toxic and flammable solvents.
Results of the search (4207 words)
The disulphide bonds of the heavy chain of rabbit immunoglobulin G. I J O'Donnell...
Intrachain disulphide bridges of rabbit immunoglobulin light chains of allotypes b4 and b5.
Disulphide arrangement in bovine caseins: localization of intrachain disulphide bridges in monomers of kappa- and alpha s2-casein from bovine milk.
  More results at FactBites »



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