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  • Inorganic Chemistry  (28)
  • Gas chromatography  (5)
  • Wiley-Blackwell  (33)
  • Institute of Physics
  • International Union of Crystallography
  • 1985-1989
  • 1980-1984  (33)
  • 1970-1974
  • 1940-1944
  • 1984  (33)
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Publisher
  • Wiley-Blackwell  (33)
  • Institute of Physics
  • International Union of Crystallography
  • Springer  (2)
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  • 1985-1989
  • 1980-1984  (33)
  • 1970-1974
  • 1940-1944
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 512 (1984), S. 211-220 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Darstellung und physikochemische Untersuchung der Nickel (II)-Komplexe mit Salizylaldehyd-S-methylthiosemicarbazonSalizylaldehyd-S-methylthiosemicarbazon (H2L) bildet mit NiII in Gegenwart von NO3- und ClO4- paramagenetische bis-Ligand-Chelat-Komplexe und in Gegenwart von NCS-, CH3COO-, Py und γ-Picolin diamagnetische, quadratisch-planare mono-Ligand-Chelat-Komplexe. In den paramagnetischen Komplexen wird H2L als neutrale Molekel und auch als Monoanion (HL-) koordiniert, in diamagnetischen Komplexen ausschließlich als Monoanion, mit Ausnahme des Komplexes in Gegenwart von CH3COO-, wo sich Salizylaldehyd-S-methylthiose micarbazon als Dianion (L2-) koordiniert. Letztere Liganden entstehen infolge der Deprotonierung der NH2- neben der OH-Gruppe. Die Komplexe wurden durch Elementaranalyse, magnetische Messungen, IR, Elektronenspektren, molare Leitfähigkeit und TG-Analysen charakterisiert.
    Notes: Salicylaldehyde S-methylthiosemicarbazone (H2L) in the presence of ClO4- forms with NiII the paramagnetic octahedral bis(ligand) chelate complexes while in the presence of NCS-, CH3COO-, Py and γ-Pic it gives diamagnetic square planar mono(ligand) chelate complexes. In the paramagnetic complexes H2L is coordinated as a neutral molecule (H2L) and monoanion (HL-), and in diamagnetic ones only as a monoanion, except the complex obtained in the presence of CH3COO-, where it is coordinated as a dianion (L2-). The last form of the ligand is the result of deprotonation, besides OH-, the NH2-group. The complexes have been characterized by elemental analysis, magnetic measurements, i.r. and diffuse-reflection spectra, molar conductivity and TG analysis.
    Additional Material: 5 Ill.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 1977-1979 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Säurekatalysierte Cyclisierung des En-Produkts aus α-Pinen und PTADAluminiumchlorid-katalysierte Reaktion des En-Produkts 2 aus 4-Phenyl-4H-1,2,4-triazol-3,5-dion (PTAD) und α-Pinen (1), des 1-(6,6-Dimelthyl-2-methylenbicyclo[3.1.1]hept-3-yl)-4-phenyl-1,2,4-triazolidin-3,5-dions, ergab 3,8,8-Trimelthyl-N-phenyl-4,5-diazatricyclo[4.2.1.03,7]nonan-4,5-dicarboxamid (6) in 78% Ausbeute. Auch Bortrifluorid-etherat, trockener Chlorwasserstoff und p-Toluolsulfonsäure katalysieren die Cyclisierung von 2 zu 6, aber nicht in diesem Maße. Der Mechanismus der Cyclisierung wird über eine Gerüstumlagerung der Carbenium-Ionen-Zwischenstufen gedeutet.
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  • 3
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metallcarbonyl-Synthesen, XVI1). Metall-Metall-Mehrfachbindungen: Synthese, Molekül- und Kristallstruktur von Tri-μ-carbonylbis([η5-pentamethylcyclopentadienyl)mangan](Mn ≡ Mn) - die erste Mangan-Mangan-DreifachbindungPhotolyse des Halbsandwich-Mangan-Komplexes (η5-C5Me5)Mn(CO)3 (1) in Tetrahydrofuran (THF) führt ohne Nebenreaktionen zum Solvenskomplex (η5-C5Me5)Mn(CO)2(THF) (2). Dieser ist im festen Zustand im deutlich unter 0°C liegenden Temperaturbereich haltbar, erleidet aber spontane CO-Eliminierung bei Raumtemperatur; dabei bildet sich der neue Zweikernkomplex (η5-C5Me5)2Mn2(μ-CO)3 (3). Während Elementaranalyse, Infrarot- und Massenspektren sowie die 1H- und 13C-NMR-Spektren dieser Verbindung eine hochsymmetrische dreifach Carbonylverbrückte Struktur zuweisen, stützt eine Einkristall-Röntgenstrukturanalyse das Vorliegen der ersten bisher bekannten Mangan-Mangan-Dreifachbindung (dMn - Mn 217.0(1) pm). Eine verbesserte Darstellung von Tricarbonyl(η5-pentamethylcyclopentadienyl)mangan (1) wird beschrieben.
    Notes: Photolysis of the manganese half-sandwich complex (η5-C5Me5)Mn(CO)3 (1) in tetrahydrofuran (thf) cleanly yields the solvent complex (η5-C5Me5)Mn(CO)2(thf) (2). Compound 2 is stable as solid at temperatures well below 0°C but undergoes spontaneous elimination of carbon monoxide at ambient temperature with concomitant formation of the novel dinuclear complex (η5-C5Me5)2-Mn2(μ-CO)3 (3). While elemental analysis, infrared and mass spectroscopy as well as the 1H NMR and 13C NMR spectra unequivocally demonstrate this compound to adopt a highly symmetrical triply carbonyl-bridged structure, a single-crystal X-ray diffraction study supports the presence of the first triple bond between manganese atoms (dMn - Mn 217.0(1) pm). An improved synthesis of tricarbonyl(η5-pentamethylclopentadienyl)manganese (1) is also described.
    Additional Material: 2 Ill.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 477-479 
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Glass capillary column ; Adsorbent ; Cold trapping ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 542-544 
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Fused silica (capillary) columns ; Bonded (cross-linked) phases ; Hydrocarbon analysis ; Olefinic hydrocarbons ; Retention index data ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Tab.
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  • 6
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Capillary columns ; Thick liquid phase films ; Natural and refinery gases ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Capillary columns having a thick liquid phase film and a low phase ratio permit the separation of low molecular mass compounds which would have a very small capacity factor on columns with a classical thin film. At the same time, the increased sample capacity allows conventional hot-wire thermal conductivity detectors to be used with such columns. The analysis of natural and refinery gases, containing both inorganic compounds and light (C1—C7) hydrocarbons, utilizing a combination of hot-wire and flame ionization detectors, is demonstrated.
    Additional Material: 10 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 33-37 
    ISSN: 0935-6304
    Keywords: Chlorinated paraffins ; Gas chromatography ; Mass spectrometry ; Negative ion ; Chemical ionization ; Capillary column ; On-column injection ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Although chlorinated paraffins (CP) are produced in large amounts (300 000 tonnes per year), little is known about their occurrence in the environment due to the lack of specific and sensitive analytical methods. The present paper describes the GC/MS analysis of different CP's using capillary gas chromatography with on-column injection and negative ion chemical ionization (NCI) mass spectrometry. Chromatographic resolution of groups of isomers and homologues was obtained. The chromatograms and mass spectra are discussed. The suitability of this method for trace analysis of a CP sample using multiple ion detection (MID) is described.
    Additional Material: 3 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 7 (1984), S. 191-195 
    ISSN: 0935-6304
    Keywords: Gas chromatography ; Saturated hydrocarbons ; Retention indices ; Molar refraction ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Kováts retention indices for a series of linear, branched, and cyclic alkanes on squalane at any temperature, and on other stationary phases of different polarity at a given temperature, are related to physicochemical properties of the solutes, such as boiling point and molar refraction, by multiple regression analysis. The equations found permit calculation of the Kováts retention index for all alkanes, with standard deviations close to experimental error. The same equations can also be used for calculating the physicochemical parameters they contain.
    Additional Material: 8 Tab.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 508 (1984), S. 197-200 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and Characterization of CuCrZrSe4 and CuCrSnSe4 Single CrystalsSingle crystals of the compounds CuCrZrSe4 and CuCrSnSe4 were grown by chemical transport using mixtures of AlCl3/I2 as transporting agents. Characterization of the crystals was done by X-ray methods. The compounds are normal spinels, the space group is Fd3m. The results of least squares refinement using single crystal X-ray data are reported.
    Notes: Einkristalle der Verbindungen CuCrZrSe4 und CuCrSnSe4 wurden durch chemischen Transport mit AlCl3/I2-Gemischen als Transportmittel erhalten. Die Charakterisierung der Kristalle erfolgte mit Röntgenmethoden. Die Verbindungen sind normale Spinelle, die Raumgruppe ist Fd3m. Die Ergebnisse der Strukturverfeinerung, ermittelt aus Einkristall-Röntgendaten, werden angegeben.
    Additional Material: 3 Tab.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 510 (1984), S. 16-24 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Structure of Ill-crystallized Calcium Hydrogen Silicates. V. Studies on the Coordination of Al in C - S - H(Di, Poly) by 27 Al-NMR SpectroscopyThe coordination of aluminium incorporated into C - S - H(Di, Poly) (∼0.07 Al2O3/SiO2) [1] has been studied by high-resolution solid-state 27 Al-NMR with magic angle spinning (MAS). It is shown that tetrahedrally as well as octahedrally coordinated Al occurs. With increasing CaO/SiO2 ratio the amount of Al[4] decreases, while that of Al[6] increases. Specimens with 1 CaO/SiO2 contain almost entirely Al - O tetrahedra and those with 1.5 CaO/SiO2 only Al - O octahedra.Questions concerning the arrangement of Al in the lattice of C - S - H(Di, Poly) are discussed.
    Notes: Die Koordination von Al in C - S - H(Di, Poly) (∼0,07 Al2O3/SiO2) [1] wurde mittels hochauflösender Festkörper-27 Al-NMR-Spektroskopie bei Probenrotation um den magischen Winkel (magic angle spinning, MAS) bestimmt. Es wird gezeigt, daß das Al in dieser Phase sowohl tetraedrisch als auch oktaedrisch koordiniert vorliegen kann, wobei in der Regel beide Koordinationsformen nebeneinander auftreten. Der Anteil an Al[4] nimmt mit wachsendem CaO/SiO2-Verhältnis der Proben ab, der des Al[6] entsprechend zu. Proben mit 1 CaO/SiO2 enthalten praktisch nur Al[4], solche mit 1,5 CaO/SiO2 nur Al[6].Die Anordnung des Al im Gitter des C - S - H(Di, Poly) wird diskutiert.
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