Dithiadiazafulvalenes:  Promising Precursors of Molecular Materials

Electroactive Benzothiazole Hydrazones and Their [Mo6O19]2− Derivatives: Promising Building Blocks for Conducting Molecular Materials

“…The poorly soluble 2 was further reacted with dimethylsulfate to form 3 in good yields by using a solvothermal procedure previously described by Manecke and Kautz, [43] modified such that the product was precipitated by using KPF 6 instead of KClO 4 , to avoid the potentially hazardous perchlorate salts. Its 1 H and 13 C NMR spectra display, respectively, only four and seven signals, as expected for the symmetrical product methylated on both nitrogen positions.…”

“…Finally, 4 was allowed to react overnight with an excess of hydrazine, to give the targeted hydrazone AMBTH-H 2 (5) in 50 % yield, as confirmed by ESI-MS (MH + : m/z 428), 1 H NMR, 13 C NMR and X-ray diffraction analyses.…”

“…[5,12] Although a wide diversity of anions has been used to provide magnetic properties, the conducting component often relies on radical cations derived from the tetrachalcogenofulvalenes, and more scarcely on the relatively unstable dithiadiazafulvalene. [13] Inspired by the pioneering works of Hünig et al [14] and then Wheland, [15] some of us have started to explore the chemistry of 2,2'-azino-bis(N-alkylbenzothiazole) derivatives as an alternative donor. Thus, using the electrocrystallisation technique [16] with commercially available 2,2'-azino-bis(3-ethylbenzothiazole-6-sulfonate) (ABTS 2À ) and various cations, hybrid organic-inorganic molecular materials have been synthesised.…”

New Materials Derived from Heterocyclic Systems

“…The structure of these compounds (136) is similar to that of tetrathiafulvalenes although they present lower air stability (Figure 27.43) [145].…”

Unsaturated five-membered selenium–silicon containing heterocycles based on the reactions of selenium di- and tetrahalides with diorganyl diethynyl silanes

“…The latter, also referred to as ''tetrachalcogenofulvalenes'', have been intensively studied for the last three decades due to their unique electrochemical [2a-2i] and synthetic properties [3a,3b]. In the last few year considerable interest has been attracted to thiazole systems as analogs of 1,3-dithioles where one sulfur atom is substituted for nitrogen atom [4]. Sulfur-silicon containing heterocycles were known only as saturated derivatives [5].…”