| | 1 | Author
| Harald Burger, Karl Hensen, Peter Pickel | Requires cookie* | | | Title
| Aluminiumbromid-Pyridiniumbromid-Verbindung: Kristallstruktur Kristallstrukturbestimmung von [Tris(pyridinium)bromid]bis(tetrabromoaluminat(III)) Crystal Structure Determination of [Tris(pyridinium)bromide]bis(tetrabromoaluminate(III))  | | | | Abstract
| The compound [(PyH) 3 Br][AlBr 4 ] 2 is formed by melting stoichiometric amounts of AlBr/PyHBr in a ratio of 2:3. It crystallizes in the orthorhombic space group Pbca with lattice constants a = 1365.5(2), b = 1616.0(2), c = 2783.7(3) pm, Z = 8, D c = 2.21 g/cm 3 . The structure was solved from 2810 diffractometer measured intensities (Cu —K" radiation) and refined to /?".(F) = 0.071. The cation shows three pyridinium ions attached via N — H — Br hydrogen bonds to a central bromide ion. The N-Br distances are 321(1), 321(2) and 332(2) pm. | | | |
Reference
| Z. Naturforsch. 43b, 963—965 (1988); eingegangen am 11. März 1988 | | | |
Published
| 1988 | | | |
Keywords
| Aluminiumbromide, Pyridiniumbromide, Addition Compound, Crystal Structure | | | |
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| default:Reihe_B/43/ZNB-1988-43b-0963.pdf | | | | Identifier
| ZNB-1988-43b-0963 | | | | Volume
| 43 | |
| 3 | Author
| Karl Hensen, Jens Gaede | Requires cookie* | | | Title
| Thermodynamische Interpretation der Schmelzdiagramme binärer Systeme aus Methylchlorsilanen und Pyridazin bzw. Pyrazin | | | | Abstract
| By analyzing the cooling curves and the resulting melting point diagrams of the chloro-methylsilane-pyridazine and pyrazine systems the existence of the incongruently melting addition compounds CH 3 SiCl 3 • Pyridazine, (CH 3) 2 SiCl 2 • (Pyridazine) 2 , (CH 3) 3 SiCl • (Pyridazine) 2 , CH 3 SiCl 3 • (Pyrazine) 2 , (CH 3) 2 SiCl 2 • (Pyrazine) 2 , (CH 3) 3 SiCl • (Pyrazine) 2 was proved. By electro-optical measurements of the turbidity point it was proved that the system (CH 3) 3 SiCl-Pyridazine exhibits a miscibility gap which intersects the liquidus curve of the amine. Based on certain approximations it was possible to fit thermodynamic functions to the experimental results to obtain the excess data of mixing of the corresponding systems. These data allow for a more profound understanding of the Lewis-acid base behaviour of the silanes and amines. A) Experimentelle Ergebnisse | | | |
Reference
| Z. Naturforsch. 42a, 341—351 (1987); eingegangen am 23. Juli 1986 | | | |
Published
| 1987 | | | |
Keywords
| Chloromethylsilanes, Pyridazine, Pyrazine, Phase Diagrams, Addition Compounds, Thermo-dynamic Excess Functions | | | |
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| default:Reihe_A/42/ZNA-1987-42a-0341.pdf | | | | Identifier
| ZNA-1987-42a-0341 | | | | Volume
| 42 | |
| 4 | Author
| Karl Hensen, Michael Dräbing | Requires cookie* | | | Title
| E in e | | | | Abstract
| A u s w e rtm e th o d e fü r D S C -K u rv e n b in ä r e r G e m isc h e sow ie d ie P h a s e n d ia g r a m m e e in ig e r M e th y lc h lo r s ila n e m it L u tid in A New Evaluation of DSC-curves of Binary Mixtures and the Phase Diagrams of Some Methylchlorosilanes with Lutidine A new evaluation of DSC-curvcs of binary mixtures is given. By analyzing the phase diagrams of methyltrichlorosilane and dimethyldichlorosilane with some lutidines the existence of the incongruently melting addition compounds MeSiCl3-(2.3-Lutidine2 ■ 3.4-Lutidine* Me2SiCl2 • (3.5-Lutidine)2, Me2SiCl2 • 3.5-Lutidine, and the congruently melting compound MeSiCl3-(3.4-Lutidine)2 was proven. | | | |
Reference
| Z. Naturforsch. 44a, 1172—1176 (1989); received September 18 1989 | | | |
Published
| 1989 | | | |
Keywords
| DSC-Curves Melting Point, Phase Diagrams, Addition Compounds, Methylchlorosi lanes, Lutidine | | | |
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| default:Reihe_A/44/ZNA-1989-44a-1172.pdf | | | | Identifier
| ZNA-1989-44a-1172 | | | | Volume
| 44 | |
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