Benzo-l,2,3-thiadiazole

The structure of the isomeric benzo-l,2,3-thiadiazole 11.30 is unknown, but the 1 1 adduct with AsFs (11.31) has been structurally characterized. The AsFs molecule is coordinated to the carbon-bonded nitrogen atom. Cycloocteno-l,2,3-selenadiazole is an effective source of selenium for the production of semi-conductors such as cadmium selenide." ... 

The bond lengths and bond angles found for benzo-l,2,3-thiadiazole by X-ray diffraction are listed in Table 3. These values are quite close to those published for a substituted 1,2,3-benzothiadiazole <1984CHEC(6)447>. 

Ammonium 2,4,6-tris(dioxoselena)hexahydrotriazine-l,3,5-triide Benzo-l,2,3-thiadiazole, 2199 Benzo-l,2,3-thiadiazole 1,1-dioxide, 2191 Bis(S,S-difluoro-N-sulfimido)sulfur tetrafluoride, 4381 Bis(dimethylamino) sulfoxide, 1757... 

Narrowing the bandgap of copolymers by alternation of electron-rich thiophene and electron-deficient benzo-l,2,3-thiadiazole units was used in the design of several LEPs whose optical and electronic properties could be tuned through such a modification. Cao and coworkers synthesized copolymers 599 and 600 (02MI2887 04MM6299), exploiting random copolymerization. 

Ammonium thiosulfate, 4568 Benzo-l,2,3-thiadiazole, 2192 Benzo-l,2,3-thiadiazole 1,1-dioxide, 2184... 

Benzyne precursors 1-Aminobenzotriazole. Benzenediazonium-2-carboxylate. Benzo-l,2,3-thiadiazole-l,l-dioxide. o-Bromofluorobenzene. o-Bromoiodobenzene. Diphenylio-donium-2-carboxylate monohydrate. 

Bei der Photolyse von Benzo-l,2,3-thiadiazolen entsteht neben PolymerenausschlieBlich Thianthren (bis 18% d.Th.)1-3. Benzo-l,2,3-thiadiazol-l,l-dioxid wird bei Bestrahlung in Methanol zu Methoxy-benzol abgebaut4. 1,2,5-Thiadiazole fragmentieren zu Carbonsaure-nitrilen6. 

Benzo-l,2,3-thiadiazole reacts with phenyl isothiocyanate to give the 2-phenylimino-l,3-benzodithiole (200), which was not isolated but converted into the quaternary ammonium salt with methyl iodide. A series of 4,6-dialkyl-... 

It was noticed that S-methyl benzo-l,2,3-thiadiazole-7-carboxylate (BTH), the first commercial SAR activator for plants, could induce a similar defense response to salicylic acid in signal transduction. Therefore, itwas interesting to investigate whether or not BTH derivatives could also induce seeondary... 

Dithiins and It4-Di elenins.—1,4-Dithiins (36) are among the photolysis products of biaryl- and benzo-l,2,3-thiadiazoles. The postulated intermediate biradicals (35) dimerize in the direction shown. Thermolysis of cycloalkeno-l,2,3-selenadiazoles produces 1,4-diselenins (37) together with cycloalkynes. A structure determination of 2,5-diphenyl-l,4-dithiin 1-oxide reveals a boat-shaped configuration (Figure) with the sulphur... 

Benzo-l,2,3-thladiazoles.—A number of conventional reactions of 5-amino-benzo-l,2,3-thiadiazole (25) have been described. They concern the amino-benzene moiety of the condensed heteroaromatic system and are outlined in Scheme 1. ... 

A series of azo-dyes (46), (47) incorporating the benzo-l,2,3-thiadiazole structure have been produced from the 5-amino-heterocycle by conventional methods, and their properties as dyes evaluated. ... 

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