# Desaurin

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Desaurin
> Markdown URL: https://mediated.wiki/source/Desaurin.md
> Source: https://en.wikipedia.org/wiki/Desaurin
> Source revision: 1351049654
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

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](/source/sulfur)-containing [heterocycle](/source/heterocycle).  The parent is 2,4-bismethylene-[1,3-dithietane](/source/1%2C3-Dithietane).  They are derived from the base-promoted condensation of carbon disulfide with "[active methylene](/source/Knoevenagel_condensation)" 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](/source/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 isomer](/source/trans_isomer)s.

==References==
<references />

Category:Dithietanes

{{heterocyclic-stub}}

---
Adapted from the Wikipedia article [Desaurin](https://en.wikipedia.org/wiki/Desaurin) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Desaurin?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.