thumb|120px|right|General structure of desaurins {{Chembox | Name = 2,4-Dimethylidene-1,3-dithietane | ImageFile = 2,4-Dimethylidene-1,3-dithietane.svg | ImageSize = 125px | IUPACName = 2,4-dimethylidene-1,3-dithietane |Section1={{Chembox Identifiers | index1_label = parent | PubChem1 = 129652735 | InChI1=1S/C4H4S2/c1-3-5-4(2)6-3/h1-2H2 | InChIKey1 = QWWVTCYHWDEKBZ-UHFFFAOYSA-N | SMILES1 = C=C1SC(=C)S1 }} |Section2={{Chembox Properties }} |Section8={{Chembox Related }} }}
'''Desaurins''' are a type of sulfur-containing heterocycle. The parent is 2,4-bismethylene-1,3-dithietane. They are derived from the base-promoted condensation of carbon disulfide with "active methylene" compounds:<ref>{{cite journal |last1=Yates |first1=Peter |last2=Moore |first2=Donald R. |last3=Lynch |first3=Thomas R. |title=Carbon Disulfide. II. Reaction with Active Methylene Compounds. The Structures of the Desaurins |journal=Canadian Journal of Chemistry |date=1971 |volume=49 |issue=9 |pages=1456–1466 |doi=10.1139/v71-238}}</ref> :{{chem2|2 Z2CH2 + 2 CS2 -> Z2C\dCS2C\dCZ2 + 2 H2S}} According to X-ray crystallography, the C<sub>4</sub>S<sub>2</sub> core of desaurins is planar.<ref>{{cite journal |last1=Selzer |first1=Tzvia |last2=Rappoport |first2=Zvi |title=Bis(dimesitylmethylene)-1,3-dithietane, -1,2,4-trithiane, and -1,2,4,5-tetrathiane. Conformation and DNMR Study. Observable Dimesityl Thioketene |journal=The Journal of Organic Chemistry |date=1996 |volume=61 |issue=21 |pages=7326–7334 |doi=10.1021/jo960911k |pmid=11667658 }}</ref> With unsymmetrical substitution (at the ends of the methylene groups), they can exist as separable cis and trans isomers.
==References== <references />
Category:Dithietanes
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