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  • 1
    Electronic Resource
    Electronic Resource
    Zur Chemie der 1,2,4-Triazine, XIV. Synthese und Reaktionen von 5-Chlor-1,2,4-triazinen (1990)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1990 (1990), S. 631-640 
    Details
    ISSN: 0170-2041
    Keywords: 1,2,4-Triazines, 5-chloro, 5-amino, 5-cyano, 5-(ω-alkinyloxy) ; Imidazo[4,5-e]-1,2,4-triazines ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The Chemistry of 1,2,4-Triazines, XIV.  -  Synthesis and Reactions of 5-Chloro-1,2,4-triazines5-Chloro-1,2,4-triazines 4 are prepared from 1,2,4-triazin-5(2H)-ones 3 and transfered into 5-amino- (7), 5-cyano (8), and 5-(ω-alkinyloxy)-1,2,4-triazines (9). 7a-d are cyclized to imidazo[4,5-e]1,2,4-triazines (10a-d).
    Additional Material: 10 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.1990199001121
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  • 2
    Electronic Resource
    Electronic Resource
    Synthese von 1,2,4-Triazinen, XV. Synthese von 1,2,4-Triazin-6(1H)-onenHerrn Prof. Dr. K. Hafner zum 65. Geburtstag gewidmet. (1992)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1992 (1992), S. 1271-1274 
    Details
    ISSN: 0170-2041
    Keywords: 1,2,4-Triazin-6(1H)-ones ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis of 1,2,4-Triazines, XV.  -  Synthesis of 1,2,4-Triazin-6(1H)-ones1,2,4-Triazin-6(1H)-ones 3 have been prepared by cyclization of α-ketoacyl chlorides 15 with amidrazones 14. 4,5-Dihydro-1,2,4-triazin-6(1H)-ones 5 were obtained by cyclization of amino acid hydrazides 10 with orthocarboxylates 11.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.1992199201210
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  • 3
    Electronic Resource
    Electronic Resource
    Differenzthermoanalytische Untersuchungen im Dreistoffsystem Lithium-Zink-Germanium (1983)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 506 (1983), S. 133-139 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Investigations in the Ternary System Lithium-Zinc-Germanium by Differential Thermal AnalysisThe section Li/Zn, Ge(1:1) of the ternary system lithium-zinc-germanium was investigated by differential thermal analysis and x-ray methods. Besides the well known phases α-, β-Li2ZnGe and Li1.25ZnGe a further so far unknown phase (δ) was obtained. In the system there are two peritectic reactions and one eutectic. The α/β-transformation of Li2ZnGe was investigated by differential thermal analysis and a mechanism of this transformation is proposed.
    Notes: Der Schnitt Li/Zn, Ge (1:1) im Dreistoff-System Lithium-Zink-Germanium wurde differenzthermoanalytisch und röntgenographisch untersucht. Neben den bekannten Phasen α-, β-Li2ZnGe und Li1,25 ZnGe wurde eine weitere bisher unbekannte Phase (δ) gefunden. Das System besitzt zwei Peritektika und ein Eutektikum. Die α/β-Umwandlung von Li2ZnGe wurde mit Hilfe der Differenzthermoanalyse näher untersucht, ein Umwandlungsmechanismus wird vorgeschlagen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19835061115
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  • 4
    Electronic Resource
    Electronic Resource
    Kinetik und Mechanismus der α/β-Umwandlung von Li2ZnGe (1986)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 537 (1986), S. 7-16 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Kinetics and Mechanism of the α/βαTransformation of Li2ZnGeThe α/β-transformation of Li2ZnGe was investigated by differential thermal analysis under nearly isothermal conditions. The possible mechanisms of solid state reactions are represented using the integrated and differentiated kinetic equations. For the investigation of DTA curves soft ware is developed to calculate the activation parameters and to find an adequate kinetic equation. A mechanism for the α/β-transformation of Li2ZnGe is proposed and discussed.
    Notes: Die α/β-Umwandlung von Li2ZnGe wurde mit Hilfe der Differenzthermoanalyse unter „quasi-isothermen“ Bedingungen untersucht. Die möglichen Mechanismen für Festkörperreaktionen werden in Form der integrierten und differenzierten kinetischen Gleichungen vorgestellt. Für die Auswertung experimenteller DTA-Kurven wurden Computer-Programme entwickelt, die es erlauben, die Aktivierungsparameter zu berechnen und eine adäquate kinetische Gleichung zu finden. Für die α/β-Umwandlung von Li2ZnGe wird ein Mechanismus vorgeschlagen und diskutiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19865370602
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