High Quality Content by WIKIPEDIA articles! Polysulfides are a class of chemical compounds containing chains of sulfur atoms. The two main classes of polysulfides are anions with the general formula Sn2?. These anions are the conjugate bases of the hydrogen polysulfides H2Sn. Organic polysulfides are also known, the main representatives have the formulae RSnR, where R = alkyl or aryl. In commerce, the term "polysulfide" usually refers to a class of polymers with alternating chains of several sulfur atoms and hydrocarbons. The general formula for the repeat unit is –[(CH2)m–Sx]n– , where x indicates the number of sulfur atoms (or rank), and n indicates the number of repeating units. Polymers containing sulfur atoms separated by hydrocarbon sequences are usually not classified polysulfides, e.g. polyphenylene sulfide (C6H4S)n.

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