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Thioacetone
Thioacetone is an organosulfur with the chemical formula (CH3)2CS. It is a lightly studied compound. The compound has been isolated as an orange or brown liquid at low temperatures.〔V.C.E. Burnop, K.G. Latham "Polythioacetone Polymer" 1967, Volume 8,, Pages 589–607.〕 Above -20 °C, thioacetone readily converts to a polymer and a trimer.〔R. D. Lipscomb; W. H. Sharkey "Characterization and polymerization of thioacetone" Journal of Polymer Science Part A-1: Polymer Chemistry 1970, Volume 8, Issue 8, pages 2187–2196. 〕
==Preparation==
: The compound is usually obtained by "cracking" the cyclic trimer ()3. The trimer is prepared by pyrolysis of allyl isopropyl sulfide or by treating acetone with hydrogen sulfide in the presence of Lewis acids.〔Bailey, William J.; Chu, Hilda "Synthesis of polythioacetone" A.C.S. Polymer Preprints 1965, vol. 6, pp. 145-55.〕〔Bohme, Horst; Pfeifer, Hans; Schneider, Erich"Dimeric thioketones" Berichte der Deutschen Chemischen Gesellschaft 1942, vol. 75B, pp. 900-9. This early report mistakes the trimer for the monomer.〕 The trimer cracks at 500-600 °C to give the thione.〔"The photoelectron and microwave spectra of the unstable species thioacetaldehyde, CH3CHS, and thioacetone, (CH3)2CS" Kroto, H. W.; Landsberg, B. M.; Suffolk, R. J.; Vodden, A. Chemical Physics Letters 1974, volume 29, 265. 〕〔
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