4,5-Ethylenedithio-l,3-dithiole-2-thione

Qualitative MO theory (extended Hiickel molecular orbital ((EHMO) method) was employed for a rationalization of the electron density distributed over the three centers S-I-I in diiodine adducts of 4,5-ethylenedithio-l,3-dithiole-2-thione <1999IC4626>. 

Ethylenedithio-l,3-dithiole-2-thione (C5H4S5) (L38) is well known as an electron donor (113,114). It is also a derivative of dmit and has a structure similar to half of. The structure determination of its metal complexes has demonstrated the unique coordination versatility of L38 (Table III). It can act as a monodentate, bidentate, or even... 

This synthesis provides easy and inexpensive access to the 4,5-dithio-l, 3-dithiole-2-thione system. By alkylation with 1,2-dibromoethane, 4,5-ethyienedithio-1,3-dithiole-2-thione, a key intermediate in the synthesis of bis(ethylenedithio)tetrathiofulvalene (BEDT-TTF) is obtained.4 5 BEDT-TTF forms... 

Ethylenedioxypyridino[4,5-fi]tetrathiafulvalene (561) has been prepared as an example of an unsymmetrical rt-donor capable of electron conduction. The compound (561) was prepared via crosscoupling l,3-dithiolo[4,5-fi]pyridin-2-one (560) with 4,5-ethylenedithio-3,l-dithiol-2-thione (559) by heating in triethylphosphite at 150°C for 5 h (Equation (51)). The reaction afforded the desired product (561) (6%) together with the self-coupled products (562) and (563) <90ZN(B)1216>. 

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