| | 1 | Author
| JensA. Nhaus, Z. Afar, A. Siddiqi, Jürgen Schimkowiak, H. Erbert, W. Roesky, H. Eiko Lueken | Requires 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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| default:Reihe_B/39/ZNB-1984-39b-1722.pdf | | | | Identifier
| ZNB-1984-39b-1722 | | | | Volume
| 39 | |
| 2 | Author
| S., C.E A —c E N G Renoble | Requires 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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| default:Reihe_B/44/ZNB-1989-44b-1233.pdf | | | | Identifier
| ZNB-1989-44b-1233 | | | | Volume
| 44 | |
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