2-(1,3-Dithiolan-2-ylidene)-5-(1,3-dithian-2-ylidene)- 1,3,4,6-tetrathiapentalene(DHDA-TTP), a hybrid of BDH-TTP and BDA-TTP, and its metallic cation-radical saltsElectronic supplementary information (ESI) available: selected crystallographic data. See http://www.rsc.org/suppdata/cc/b2/b200556p/
The synthesis and electrochemical properties of the DHDA-TTP donor, a hybrid of 2,5-bis(1,3-dithiolan-2-ylidene)-1,3,4,6-tetrathiapentalene (BDH-TTP) and 2,5-bis(1,3-dithian-2-ylidene)-1,3,4,6-tetrathiapentalene (BDA-TTP), has been investigated, and its ability to form metallic cation-radical salts is elucidated.
molecular structure of a new pi-electron donor, 2,5-bis(1,3-dithian-2-ylidene)-1,3,4,6-tetrathiapentalene (BDA-TTP), is described. In contrast to the hitherto-known tetrachalcogenafulvalene pi-donors providing organicsuperconductors, this donor contains only the bis-fused 1,3-dithiole-2-ylidene unit as a pi-electron system, yet produces a series of ambient-pressure superconductors beta-(BDA-TTP)2X [X = SbF6
Dichalcogenane Derivatives of Methylenedithio(ethylenedithio)tetrathiafulvalene (MET) and a Derived Metallic Cation-Radical Salt with Screwed Donor Stacks
(1,3-dithian-2-yl)methylenedithio(ethylenedithio)tetrathiafulvalene (DTA-MET), and the preparation of their charge-transfer (CT) materials are investigated to explore new organicmetals. The resulting (DOA-MET)3AuI2 salt exhibits weak metallic conducting behavior, and has screwed donor stacks.
Two new organic electron donor molecules are synthesized on the basis of the ethylthio-substituted tetrathiapentalenes with a methylenedithio or a 1,3-dithiane unit. These donors provide four isostructural radical-cation salts, which belong to a new crystal type with uniform stacks of the donor molecules. These salts show metallic conductivity down to low temperatures, linear temperature dependence of the thermoelectric power, and asymmetrical ESR lineshapes. The obtained uniform structure is compared with the previous uniform structure from the viewpoint of crystal packing.