| | 1 | Author
| Mit Alkylderivaten Von Bor, GalliumUnd Aluminium, Indium, Wolfgang Kaim | Requires cookie* | | | Title
| Koordinationsverbindungen des reduzierten Pyrazins  | | | | Abstract
| The alkyls MR3 (M = B, AI, Ga, In) react with pyrazine (Pz) and sodium in THF to yield persistent radical complexes Pz(MR2)2 ,+ MR4~ (1). Use of TIR3 leads to rapid deposi-tion of thallium metal. The formation of these ionic complexes 1 is the result of MR3 dissociation into +MR2 and -MR4 ions. All radicals have been identified and characterized by ESR; the data reveal the influence of N3B back bonding in the boron derivative. | | | |
Reference
| Z. Naturforsch. 36b, 677—682 (1981); eingegangen am 6. März 1981 | | | |
Published
| 1981 | | | |
Keywords
| Pyrazine, Alkali Metal Reduction, Group III Alkyls, Radical Complexes, ESR Spectra | | | |
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| default:Reihe_B/36/ZNB-1981-36b-0677.pdf | | | | Identifier
| ZNB-1981-36b-0677 | | | | Volume
| 36 | |
| 2 | Author
| Wolfgang Kaim | Requires cookie* | | | Title
| Koordinationschemie reduzierter N-Heterozyklen. Komplexe des Pyrazin-Radikalanions mit Phenylmetallkationen +MPh von Beryllium, Magnesium und Zink Coordination Chemistry of Reduced N-Heterocycles. Complexes of Pyrazine Anion Radical with Phenyl Metal Cations + MPh of Beryllium, Magnesium and Zinc | | | | Abstract
| The diphenyls MPh2 (M = Be, Mg, Zn, Cd, Hg) have been reacted with pyrazine (Pz) in tetrahydrofuran. Only the magnesium derivative undergoes electron transfer to yield the 1:1 radical complex [Pz(MgPh)] -. However, in the presence of sodium or potassium persistent 1:2 complexes [Pz(MPh)2]t are formed with M = Be, Mg, Zn. Use of the higher homologues CdPh2 and HgPh2 leads to reduction to the metals. The 1:2 complexes have been characterized by ESR spectroscopy; metal coupling constants of 9 Be, 25 Mg and 67 Zn could be determined in natural isotopic abundance. | | | |
Reference
| Z. Naturforsch. 36b, 1110—1116 (1981); eingegangen am 4. Mai 1981 | | | |
Published
| 1981 | | | |
Keywords
| Pyrazine, Electron Transfer, Group II Aryls, Radical Complexes, ESR Spectra | | | |
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| default:Reihe_B/36/ZNB-1981-36b-1110.pdf | | | | Identifier
| ZNB-1981-36b-1110 | | | | Volume
| 36 | |
| 3 | Author
| B. Roßenbeck, W. S. Sheldrick | Requires cookie* | | | Title
| Three-dimensional Copper(I) Halide Based Coordination Networks with Asymmetrically Substituted Bridging N-Donor Ligands | | | | Abstract
| The discrete complex [(Cul)2 (pyzCN)4] (1) and the coordination polymers ^ [CuI(pyzCN)] (2) and 3 [(CuX)3 (pyzCN)2] (3, 4; X = Br, Cl) may be prepared from the respective copper(I) halide CuX and 2-cyanopyrazine (pyzCN) by self-assembly in acetonitrile solution at 100-120°C. Whereas 2 exhibits 1 [Cul] staircase double chains as its characteristic substructure, the three-dimensional netwo'rks of 3 and 4 contain single zigzag CuX strings. The influence of the copper(I) halide on both the connectivity pattern and the dimensionality of a resulting coordination network is particularly apparent for the 1:1 complexes ^ [CuI(pymMe)] (5), 3 [(CuBr)3(pymMe)_3] (6) and ^ [CuCl(pymMe)] (7), which were generated by reaction of öaX with 4-methylpyrimidine (pymMe) under reaction conditions similar to those above. | | | |
Reference
| Z. Naturforsch. 54b, 1510—1516 (1999); received August 27 1999 | | | |
Published
| 1999 | | | |
Keywords
| Copper (I) Halides, Coordination Polymers, Crystal Engineering, Pyrazine, Pyrimidine | | | |
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| default:Reihe_B/54/ZNB-1999-54b-1510.pdf | | | | Identifier
| ZNB-1999-54b-1510 | | | | Volume
| 54 | |
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