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• W2020200274 abstract "The preparation and isolation in the solid state of five aryl 1,2,3,5-dithia- and diselenadiazolyls is reported. The structure of the dimer of 4-ClC6H4CN2S2 in the solid state was obtained: monoclinic, C2/c with Z = 8, a = 20.982(10), b = 10.058(3), c = 15.867(6) Å, β = 93.34(4)°, R = 0.066, Rw = 0.053 for 1 099 data. Cyclic voltammetry shows reversible oxidation to a 6π cation for all 10 compounds in both CH2Cl2 and CH3CN; reversible reduction to an 8π anion is observed in CH2Cl2 for all except X = CF3, E = S. The reductions are only quasi-reversible in CH3CN for E = Se. The oxidation process is independent of chalcogen type; the reduction process is found to be about 0.2 V more negative for E = S vs E = Se. Elektrochemische Nachweise zur Existenz von drei stabilen Oxidationsstufen der Heterocyclen des Typs XC6H4CN2E2 (E = S, Se). Kristallstruktur des Dimeren mit X = Cl, E = S Die Darstellung und Isolierung von fünf Aryl-1,2,3,5-dithia- und -diselenadiazolylen wird mitgeteilt. Die Kristallstruktur des Dimeren von 4-ClC6H4CN2S2 wird bestimmt: monoklin, Raumgruppe C2/c, Z = 8, a = 20,982(10), b = 10,058(3), c = 15,867(6) Å, β = 93,34(4)°, R = 0,066, Rw = 0,053 für 1 099 Parameter. Cyclovoltammetrische Messungen zeigen reversible Oxidation zu einem 6π-Kation für alle 10 Verbindungen in CH2Cl2 und CH3CN; reversible Reduktion zu einem 8π-Anion wird in CH2Cl2 für alle Verbindungen außer bei X = CF3, E = S beobachtet. Die Reduktionen sind in CH3CN nur quasi-reversibel bei E = Se. Der Oxidationsprozeß ist unabhängig vom Chalkogen; der Reduktionsprozeß ist um 0,2 V negativer für E = S gegenüber E = Se." @default.
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• W2020200274 title "Electrochemical evidence for the existence of three stable oxidation states for heterocycles of the type X?C6H4?CN2E2 (E = S, Se). X-ray crystal structure of the dimer with X = Cl, E = S" @default.
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• W2020200274 doi "https://doi.org/10.1002/zaac.19946200916" @default.
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