Crystal structures, and electrical conduction and magnetic properties in CuCl4 salts of dimethylthio- and ethylenedithio-tetrathiafulvalenothioquinone-1,3-dithiolemethides

One-Dimensional CuBr42- Ion Array and CuBr3- Ion Chain Included in the π Conducting Framework Composed of Bis(methylthio)tetrathiafulvalenothioquinone-1,3-dithiocarbonatodithiolemethide Molecules

“…In the ESR spectrum of the microcrystals of 1 4 ·CuBr 4 ·2CuBr 3 at 300 K one weak and broad (peak-to-peak width, Δ H pp = 607 Oe) doublet signal appeared at g = 2.0873. This signal can be readily assigned to be due to the Cu(II) d spins of CuBr 4 2- ions and {CuBr 3 - } n from the observed g -value . Presumably, the signal with a comparatively weak intensity due to the conducting π spins of 1 molecules is also very broad , and hidden inside the d signal.…”

Crystal Structures, and Electrical Conducting and Magnetic Properties in the Plate Crystals of (Ethylenedithiotetrathiafulvalenoquinone-1,3-dithiolemethide)2·MX4 (M=Fe, Ga, X=Br; M=Fe, X=C1) Salts

“…The p=d interaction is scarcely present or very weak in the CT salts other than l-(BETS) 2 Á FeCl 4 (8) and k-(BETS) 2 Á FeBr 4 (4,5), in which significant interaction however begins to occur at temperatures lower than 10 K. Because of these circumstances, current attention is directed toward developing new molecular/organic systems with much stronger p=d interaction. Very recently, we have succeeded in the synthesis of new donor molecules, tetrathiafulvaleno-thioquinone-1,3-dithiolemethides and -quinone-1,3-dithiolemethides substituted with two methylthio or one ethylenedithio groups (9,10), which have an electron-donating ability comparable to TTF and can also capture several magnetic-metal salts via coordination to the thiocarbonyl sulfur or carbonyl oxygen atom. Indeed, the thioquinones formed 1:1 complexes with CuBr 2 (11).…”

Structural Conformers of (1,3-Dithiol-2-ylidene)ethanethioamides: The Balance between Thioamide Rotation and Preservation of Classical Sulfur–Sulfur Hypervalent Bonds

“…These values of the angles are a consequence of a rotation around the single bond C–C contained on the path connecting the CS and C–S bonds, as displayed in the inset of Figure , for all the conformers of structure 7 . This C–C bond in all conformers of structure 7 is long, with values ranging between 1.489(7) Å and 1.512(8) Å, and these values are only exceeded for one reported compound (1.52(1) Å and 1.54(1) Å) having similar structural fragments as the ones shown in Scheme . The exocyclic double bond CC in compound 7 is the shortest bond found for compounds with this structural fragment, and the CS bond values are the average of those experimentally observed in CSD.…”