Английская Википедия:Ethenedithione
Ethenedithione or ethylenedithone is an unstable chemical substance with formula S=C=C=S made from carbon and sulfur.
Ethenedithione can exist as a gas at low pressure and high temperature, but is unstable when condensed or under higher pressure.[1]
It can be stabilized as a ligand binding two cobalt atoms.[2]
Other occurrences as a ligand are in TpW(CO)2(C2S2)– and [TpW(CO)2]2Ni(C2S2)2, where Tp is trispyrazolylborate.[3]
Formation
Ethenedithione can be made by the flash vacuum pyrolysis of 2,5-Dithiacyclopentylideneketene.[1]
Also it has been made by dissociative ionization of tetrathiapentalenedione, and then neutralisation of ions produced.[4]
C2S2 is made along with carbon subsulfide and carbon monosulfide, in an electric discharge in carbon disulfide vapour.[5]
Properties
In its ground state it is a triplet state (3Σg−).[6] Ethenedithione can be trapped in a matrix of solid argon without decomposition.[1]
The infrared spectrum contains a prominent line at 1179.3 cm−1 due to asymmetric C=S stretch of the most common isotopes.[1]
Over 60K, ethenedithione polymerises.[7] Possible polymerisation products include polythiene.[8]
References
