Disulfide

Disulfides are chemical compounds that contain two sulfur atoms bonded to each other the value 2.

Ionian disulfides

Ionian disulfides containing the anion S22 and are formally salts of volatile disulphane H2S2. An example is pyrite ( FeS2 ).

Covalent disulfide

Covalent disulfide, also known as disulfanes, have the general formula R1 -SS- R2. For symmetrical disulfides R1 = R2 applies, for unsymmetrical disulfides the organic radicals are different R1 and R2.

Low molecular weight organic disulfides are non-polar, volatile, malodorous substances. The simplest representative of this class of compounds is dimethyl disulfide. It is known that the characteristically designed garlic and onion odor -causing diallyl disulfide. Organic disulfides having a higher molar mass, however, are odorless.

Occurrence

Disulfide bridges in Cystineinheiten of proteins ( insulin, keratin, oxytocin, etc.) play an important role in their tertiary structure. Furthermore, we find the disulfide structure in heterocyclic natural products such as ( )- lipoic acid and Asparagusinsäure.