Of dithiiranes, 1,2-dithietanes, and 1,2-dithietes

Progress in the chemistry of three- and four-membered rings containing two sulfur atoms has been rapid in the past few years. An updated survey of the chemistry of dithiiranes, 1,2-dithietanes, and 1,2-dithietes is now provided from a major center in this area by Professor J. Nakayama and Dr. A. Ishii (Saitama University, Japan). 

Tlie present chapter reviews the chemistry of three- and four-membered ring compounds containing an S—S bond in their ring. Dithiiranes 1,2-dithietanes and 1,2-dithietes are the compounds of this type. Although 1,3-dithietanes are four-membered heterocycles which are prepared much more easily and are seemingly more familiar, they have no S-S bond in the ring and hence are not included in this chapter. 

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