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'H eterocycles' in keywords
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1989 (1)
1984 (1)
1Author    JensA. Nhaus, Z. Afar, A. Siddiqi, Jürgen Schimkowiak, H. Erbert, W. Roesky, H. Eiko LuekenRequires cookie*
 Title    Darstellung und Eigenschaften von Cyclo-1 A6-metalla-3,5-ditha-2,4,6-triazenen Synthesis and Properties of Cyclo-lÄ6-metalla-3,5-dithia-2,4,6-triazenes Tam m annstraße 4, D -3400 G öttingen  
 Abstract    The metallacycles [C13M S2N 3]2 (M = M o, W) l a and 2a have been obtained from reactions of S4N 4 with M o2C l10 and WC16, respectively, and from S3N 3C13 with the hexacarbonyls M (C O)6. The adducts C13MS2N 3 • CH 3CN lb and 2 b are form ed with acetonitrile, and the salts [Ph4A s~][C l4MS2N 3~] l c and 2c with addition o f Ph4A sC l. R eactions o f M o2C110 and WC16, respectively, with related S —N com pounds lead predom inantly to l a and 2a; M o2C110 reacts with S 3N 2C12 to give l a , and with [M e3SiN ]2S to give [Cl3M oN ]t. while W Cl6 yields C14WNSC1 with S 3N 2C12, and 2a with [M e3SiN ]2S. [Cl3M oN ]v does not react with S4N 4, but [C13W N]A . forms 2a. R eactions of VC14 and V O C l3 with [M e3SiN ]2S give [Cl2V S 2N 3]v, 3. 2c has also been obtained by 
  Reference    Z. Naturforsch. 39b, 1722—1728 (1984); eingegangen am 13. Septem ber 1984 
  Published    1984 
  Keywords    Sem i-conductor, H eterocycles, NM R spectra, Susceptibility 
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 TEI-XML for    default:Reihe_B/39/ZNB-1984-39b-1722.pdf 
 Identifier    ZNB-1984-39b-1722 
 Volume    39 
2Author    S., C.E A —c E N G RenobleRequires cookie*
 Title    Struktur und Magnetismus stabiler Radikalkation-Salze: N,N'-Diethylchinoxalinium Tetraphenylborat im Vergleich mit Pyrazinium-und Phenazinium-Analogen  
 Abstract    tructure and M agnetism of Stable C ation R adical Salts: N ,N '-D iethylquinoxalinium T etra p h en y lb o rate as C o m p ared w ith Pyrazinium and Phenazinium A nalogues H .-D . H au sen 3, W olfgang K aim a *, A nd reas Schulz3 und E b e rh a rd R o th 3 b Crystal and m olecular structure analysis o f N ,N '-diethylquinoxalinium tetraphenylborate shows a virtually planar quinoxaline ring with 1 1 conjugated .t electrons and approxim ately antiperipla-nar ethyl groups. In comparison with the benzo-analogous phenazinium system s and the de-benzo derivative N.N'-diethylpyrazinium cation, the quinoxalinium species adopts an interm ediate posi­ tion in terms o f intra-and intermolecular structural features. In particular, increasing benzanella-tion seem s to favour a cation/anion approach for electrostatic reasons w hereas the N —C bonds to the hyperconjugatively charge delocalizing alkyl groups increase due to peri interactions. Solid state magnetic and ESR measurements are com patible with the crystallographically determined structure. 
  Reference    Z. Naturforsch. 44b, 1233 (1989); eingegangen am 27. April 1989 
  Published    1989 
  Keywords    H eterocycles, Radical Cations, Structure, M agnetism E SR Spectra 
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 TEI-XML for    default:Reihe_B/44/ZNB-1989-44b-1233.pdf 
 Identifier    ZNB-1989-44b-1233 
 Volume    44