| 1 | Author
| Ulrich Wannagat, Thomas Blumenthal, Gerd Eisele, Axel König, Reinhard Schächter, Braunschweig | Requires cookie* | | Title
| Synthese von neuen Silazangerüstsystemen * Synthesis of Some Silazane Frameworks  | | | Abstract
| Some novel silazane frameworks (scheme 1: H,J, K, M, P) were synthesized and charac-terized by mainly methyl substituted derivatives. Synthetic routes are given in Scheme 2 and 3, respectively, as well as in equations (13) and (14). Compounds are described in their properties, physical data and elemental and structure analysis. | | |
Reference
| Z. Naturforsch. 36b, 1479—1485 (1981); eingegangen am 7. Mai 1981 | | |
Published
| 1981 | | |
Keywords
| Silazanes, Cyclosilazanes, Synthesis | | |
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| default:Reihe_B/36/ZNB-1981-36b-1479.pdf | | | Identifier
| ZNB-1981-36b-1479 | | | Volume
| 36 | |
2 | Author
| Ingrid Riess-Maurer, Hildebert Wagner, András Lipták | Requires cookie* | | Title
| Synthesis of Kaempferol-3-0-(3",4'' -di-O-a-L-rhamnopyranosy^-^-D-galactopyranoside and its Comparison with the Natural Ascaside Isolated from Astragalus caucasicus  | | | Abstract
| The trisaccharide, 3,4-di-0-(a-L-rhamnopyranosyl)-D-galactose was synthesized using benzyl 2,6-di-0-benzyl-/?-D-galactopyranoside as starting compound. Its acetobromo derivative was coupled with 4',7-di-O-benzyl-kaempferol. The structure of the synthetic kaempferol trioside was characterised by different spectroscopic methods (UV, IR, X H, 13 C NMR and MS). Chromatographic and mass spectrometric comparison of the synthetic product with ascaside precluded their identity. | | |
Reference
| Z. Naturforsch. 36b, 257—261 (1981); received October 21 1980 | | |
Published
| 1981 | | |
Keywords
| Trisaccharide, Synthesis, Synthetic Kaempferol Trioside | | |
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| default:Reihe_B/36/ZNB-1981-36b-0257.pdf | | | Identifier
| ZNB-1981-36b-0257 | | | Volume
| 36 | |
3 | Author
| Birgit Lehnis, Joachim Strähle | Requires cookie* | | Title
| Synthese und Kristallstruktur von C83(AuBr 4 ) 2 Br3 Synthesis and Crystal Structure of Cs3(AuBr4) 2 Br 3  | | | Abstract
| Cs3(AuBr4)2Br3 is obtained in the form of red needles by adding the stoichiometric amount of CsBr to a solution of HAuBr4 and Br3~ in aqueous HBr. The salt decomposes slowly at room temperature to form a mixed-valent, cubic bromo aurate(I,III), in which the linear AuBr 2 ~ ions are partially substituted by Br3~ ions. At 140 °C Cs 2 Au 2 Bre and CsBr are formed. Cs3(AuBr4) 2 Br3 crystallizes monoclinic with four formula units in the space group P2i/c. The structure is built up by AuBr 4 ~ and Br3~ anions and Cs+ cations. An average Au-Br distance of 242.2 pm was found for the square planar AuBr 4 ~ ion. The linear Br3~ groups are almost symmetrical with Br-Br distances of 254.0 and 256.2 pm. Therefore only two vibrations are observed in the IR spectrum: Vas = 172, <5 = 56 cm -1 . The absorptions of the AuBr 4 _ groups are: vas = 250, <5as= 113, y — 102 cm -1 . | | |
Reference
| Z. Naturforsch. 36b, 1504—1508 (1981); eingegangen am 8. September 1981 | | |
Published
| 1981 | | |
Keywords
| Synthesis, IR Spectra, Crystal Structure | | |
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| default:Reihe_B/36/ZNB-1981-36b-1504.pdf | | | Identifier
| ZNB-1981-36b-1504 | | | Volume
| 36 | |
6 | Author
| Eberhard Schweda, Joachim Strähle | Requires cookie* | | Title
| Nitrido-azido-Komplexe des Molybdäns(VI) Synthese und Kristallstruktur von MoN(N3)3(NC5H5) Nitrido Azido Complexes of Molybdenum (VI) Synthesis and Crystal Structure of MoN(N3)3(NC5H5)  | | | Abstract
| The explosive nitrido azido complexes MoN(N3)Cl2 • py and MoN(N3)3py are prepared by the reaction of MoCLi(py)2 with (CH3)3SiN3 in 1,2-dichloroethane. Both compounds hydrolyze quickly in moist air. After separation of the insoluble, black MoN(N3)Cl2 • py from the solution of MoN(N3)3py, the latter can be obtained in form of monoclinic, red crystals of the space group C2/c. Its structure consists of monomeric complexes, wherein the Mo atom has a square pyramidal coordination. The nitrido ligand occupies the apex and forms a strong multiple bond of 163.4 pm to the Mo atom. cr-Bonds of different strength exist between the Mo atom and the basal ligands: M0-N3 — 204.3 pm; Mo-py = 225.8 pm. The a-N atoms of the azido groups are sp 2 hybridized, with their lone pair pointing away from the nitrido ligand. The pyridine ligand forms an angle of 61.6° to the basal plane of the coordination polyhedron. | | |
Reference
| Z. Naturforsch. 36b, 662—665 (1981); eingegangen am 10. März 1981 | | |
Published
| 1981 | | |
Keywords
| Synthesis, Crystal Structure, Molybdenum Nitrido Azido Complexes | | |
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| default:Reihe_B/36/ZNB-1981-36b-0662.pdf | | | Identifier
| ZNB-1981-36b-0662 | | | Volume
| 36 | |
7 | Author
| Siegfried Pohl, Ulrich Seyer, Bernt Krebs | Requires cookie* | | Title
| Sulfidhalogenide des Germaniums: Darstellung und Strukturen von Ge4S6Br4 und Ge4S6I4 Thiohalides of Germanium: Preparation and Structures of Ge4SeBr4 and Ge4S6l4  | | | Abstract
| The reaction of GeX4 (X = Br, I) and H2S in CS2 yields Ge4S6Br4 (1) and Ge4S6Li (2). The crystal structures of 1 and 2 were determined from single crystal X-ray data (1: PT, a == 880.6, b = 993.4, c = 1010.6 pm, a = 86.05, ß = 64.00, y = 89.87°, V = 792 • 10 6 pm 3 , Z = 2,2 : P"3, a = 1064.0, c = 946.1 pm, V = 928 • 10 6 pm 3 , Z = 2). They consist of isolated adamantane-like molecules. | | |
Reference
| Z. Naturforsch. 36b, 1432—1436 (1981); eingegangen am 23. Mai 1981 | | |
Published
| 1981 | | |
Keywords
| Thiohalides of Germanium, Synthesis, Crystal Structure | | |
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| default:Reihe_B/36/ZNB-1981-36b-1432.pdf | | | Identifier
| ZNB-1981-36b-1432 | | | Volume
| 36 | |
8 | Author
| Trimethylsilyl Tetrafluorotellurates, Vi, Benno Bildstein, Walter Tötsch, Fritz Sladky, E-F=. Me, E-R | Requires cookie* | | Title
| Trimethylsüyl-tetrafluorotellurate(VI)  | | | Abstract
| The interaction of MesSiCl with eis-and trans-(HO)2TeF 4 and eis-and £ran.s-HOTeF 4 OCH 3 yields eis-and trans-(Me3SiO)2TeF 4 and eis-and <rans-Me3SiOTeF 4 OCH3, respectively, which have been characterized by NMR spectroscopy (125 Te, 29 Si, 19 F, X H). Die Trimethylsilylgruppe ist eine häufig verwen-dete Abgangsgruppe in Reaktionen mit Fluoriden: | | |
Reference
| Z. Naturforsch. 36b, 1542—1543 (1981); eingegangen am 22. Juli 1981 | | |
Published
| 1981 | | |
Keywords
| Synthesis, Trimethylsilyl Tetrafluorotellurates(VI), NMR Spectra | | |
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| default:Reihe_B/36/ZNB-1981-36b-1542.pdf | | | Identifier
| ZNB-1981-36b-1542 | | | Volume
| 36 | |
9 | Author
| OttoJ. Scherer, Heribert Jungmann | Requires cookie* | | Title
| Phosphor-Ylid-Komplexe des Platins Phosphorus Ylide Complexes of Platinum  | | | Abstract
| The interaction of eis/trans-[Pt(PPI13) 2 (CH2CI)Cl] (1) with Ph 3 P gives the ylide complex cis-[Pt(PPh 3) 2 (CH 2 PPh 3)Cl]Cl (2), which forms cis-[Pt(PPh 3)(CH 2 PPh 3)Cl 2 ] (3) on heating in benzene. In CH 2 C1 2 , Ph 3 P is added again quanti-tatively with formation of 2. Irradiation of 3 with a 500 W lamp yields cw-Cl 2 Pt(PPh 3) 2 . The ylide complexes 4 and 6 were prepared by treatment of 3 with (Me2N) 3 P or Ph 3 As. 3 and Ph 2 P(CH 2) 2 PPh 2 form the chelate ylide com-plex 6. | | |
Reference
| Z. Naturforsch. 36b, 1663—1665 (1981); eingegangen am 26. August 1981 | | |
Published
| 1981 | | |
Keywords
| Phosphorus Ylide Complexes, Synthesis, NMR Spectra | | |
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| default:Reihe_B/36/ZNB-1981-36b-1663_n.pdf | | | Identifier
| ZNB-1981-36b-1663_n | | | Volume
| 36 | |
10 | Author
| Ortwin Leitzke, Fritz Sladky | Requires cookie* | | Title
| Darstellung  | | | Abstract
| von Antimon(V)tetrafluorid-pentafluorotellurat(YI), SbF4OTeF5 und Antimon(V)trifluorid-bis[pentafluoro-tellurat(VI)], SbF3(OTeF5)2 Preparation of Antimony(V)tetrafluoride-pentafluorotellurate(VI), SbF4OTeF5 and Antimony(V)trifluoride-bis[pentafluoro-tellurate(VI)], SbF3(OTeF5)2 The interaction of SbF5 with B(OTeF5)3 yields SbF4OTeF5 and SbF3(OTeF5)2. | | |
Reference
| Z. Naturforsch. 36b, 268—269 (1981); eingegangen am 13. Oktober 1980 | | |
Published
| 1981 | | |
Keywords
| Synthesis, 19 F NMR Spectra, Pentafluorotell urates (VI), Antimony (V) | | |
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| default:Reihe_B/36/ZNB-1981-36b-0268_n.pdf | | | Identifier
| ZNB-1981-36b-0268_n | | | Volume
| 36 | |
11 | Author
| Peter Westhoff, Kurt Zimmermann, Frank Boege, Klaus Zetsche | Requires cookie* | | Title
| Regulation of the Synthesis of Ribulose-l,5-bisphosphate Carboxylase and Its Subunits in the Flagellate Chlorogonium elongatum. II. Coordinated Synthesis of the Large and Small Subunits  | | | Abstract
| Transfer of heterotrophically grown cells of the unicellular green alga Chlorogonium elongatum to autotrophic growth conditions causes a 10 -1 5 fold increase in the amount o f the chloroplastic enzyme ribulose-1,5-bisphosphate carboxylase. This increase was found to be due to de novo synthesis. The relative proportions o f large and small subunits o f the enzyme do not change. Their ratio is close to 3.4, the proportions in weight o f the two subunits in the holoenzyme. Continous labelling with [35S]sulfate reveals that the ratios of incorporation into large and small subunits are essentially the same in autotrophic and heterotrophic cells. Pulse-chase experiments show that the subunits are degraded synchronously. The coordinated subunit synthesis cannot be uncoupled using inhibitors o f protein and RNA synthesis or high temperature of cultivation of the alga. The results suggests a very tightly coordinated synthesis o f the large and small subunits of ribulosebisphosphate carboxylase. | | |
Reference
| Z. Naturforsch. 36c, 942 (1981); received July 18 1981 | | |
Published
| 1981 | | |
Keywords
| Ribulose-1, 5-bisphosphate Carboxylase, Synthesis, Subunits, Regulation, Phytoflagellate Chlorogonium elongatum | | |
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| default:Reihe_C/36/ZNC-1981-36c-0942.pdf | | | Identifier
| ZNC-1981-36c-0942 | | | Volume
| 36 | |
12 | Author
| Jochen Ellermann, Martin Lietz | Requires cookie* | | Title
| Chemie polyfunktioneller Liganden, 69 [1] Über drei Organo-Arsen-Käfigverbindungen mit Noradamantanstruktur Chemistry of Polyfunctional Ligands, 69 [1] Three Organo-Arsenic Cage Compounds with Noradamantane Structure  | | | Abstract
| The reaction of l.l.l-tris(diiodarsinomethyl)ethane, CH3C(CH2Asl2)3 (1), with H 2 C(COOC 2 H 5)2, H 2 C(COOCH 3)2 and H 2 C(COC 6 H 5)2 in presence of the auxiliary base (C 2 Hs)3N gives the noradamantane structured compounds CH3C(CH2As)3E2 [E = C(COOC 2 H 5)2 (2), C(COOCH 3) 2 (3) and C(COC 6 H 5) 2 (4)]. The new compounds have been characterized by mass spectrometry and infrared, Raman and X H NMR spectroscopy. | | |
Reference
| Z. Naturforsch. 36b, 1532—1537 (1981); eingegangen am 5. August 1981 | | |
Published
| 1981 | | |
Keywords
| Arsenic Cage Compounds, Synthesis, Vibrational Spectra, Mass Spectra, X H NMR Spectra | | |
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| default:Reihe_B/36/ZNB-1981-36b-1532.pdf | | | Identifier
| ZNB-1981-36b-1532 | | | Volume
| 36 | |
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