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  Thioketones are organic compounds related to conventional ketones. Instead of the formula R2C=O, thioketones, or thiones as they are also called, have the formula R2C=S. Unhindered thioketones are typically unstable; such compounds tend to form polymers or rings.


Preparative methods

One approach to generating thiocarbonyl-molecules entails treating a ketone with Lawesson's reagent. Other methods use of an hydrogen chloride with hydrogen sulfide. Bis(trimethylsilyl)sulfide has also been employed.[1]

Thiobenzophenone, the prototype

  Thiobenzophenone, (C6H5)2CS, is quite stable. This deep blue compound dissolves readily in organic solvents. It photooxidizes in air to benzophenone and sulfur. Since the discovery of thiobenzophenone, a variety of related thiones have been prepared by the Tokitoh group.[2]


The selenium versions of the thioketones are less stable than thiones.[2] Selenobenzophenone reversibly dimerizes. It is known to react with 1,3-dienes in a Diels-Alder reaction.[3]

See also

Thial, for a description of thioaldehydes.


  1. ^ W. M. McGregor, D. C. Sherrington (1993). "Some Recent Synthetic Routes to Thioketones and Thioaldehydes"". Chemical Society Reviews 22: 199 - 204. doi:10.1039/CS9932200199.
  2. ^ a b Okazaki, R.; Tokitoh, N. (2000). "Heavy Ketones, the Heavier Element Congeners of a Ketone". Accounts of Chemical Research 33: 625-630. doi:10.1021/ar980073b.
  3. ^ Erker, G.; Hock, R.; Krüger, C.; Werner, S.; Klärner, F.-G. and Artschwager-Perl, U. (1990). "Synthesis and Cycloadditions of Monomeric Selenobenzophenone". Angewandte Chemie International Edition in English 29: 1067-68. doi:10.1002/anie.199010671.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Thioketone". A list of authors is available in Wikipedia.
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