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  • 1
    Electronic Resource
    Electronic Resource
    Displacement of the nitro group of substituted nitrobenzenes-a synthetically useful process (1976)
    s.l. : American Chemical Society
    The @journal of organic chemistry 41 (1976), S. 1560-1564 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00871a016
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  • 2
    Electronic Resource
    Electronic Resource
    (eta3-Triphenylcyclopropenyl) tricarbonylcobalt (1979)
    s.l. : American Chemical Society
    Inorganic chemistry 18 (1979), S. 1687-1691 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic50196a058
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  • 3
    Electronic Resource
    Electronic Resource
    Copolymers from 1-phenyl-2-(3-vinylphenylthio)-diazen and styrene and grafting with acrylonitrile (1979)
    Springer
    Polymer bulletin 1 (1979), S. 679-684 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary A new azo monomer (2) was synthesized and copolymerized with styrene. The resulting azo copolymer could be used as an initiator for the acrylonitrile polymerisation yielding grafted copolymers. Quantitative treatment of the grafting experiments leads to the conclusion that the intermediate thiyl radicals show less reactivity towards monomers than phenyl radicals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255442
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  • 4
    Electronic Resource
    Electronic Resource
    Kinetik des thermischen Zerfalls einiger unsymmetrischer Azoverbindungen der Struktur Ar-N=N-C(CH3)2(NO2) (1975)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 1533-1540 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Kinetics of the Thermal Decomposition of some Unsymmetric Azo Compounds of the Structure Ar—N=N—C(CH3)2(NO2)2-Arylazo-2-nitropropanes decompose in solution at about 140°C with first order kinetics, the activation energy being 130 to 150 kJ/mole, depending on the aromatic substituents. Gaseous and some of the non-volatile decomposition products have been analyzed and their mechanisms of formation have been discussed. Most of the non-volatile products are formed by the reaction of fragments of the starting compounds with the solvent. One of the isolated reaction products (7-methylindazole) demonstrates quite clearly that the azo compounds decompose via aryldiazylintermediates.
    Notes: 2-Arylazo-2-nitropropane zerfallen in Lösung bei Temperaturen um 140°C nach einem Zeitgesetz 1. Ordnung mit Aktivierungsenergien zwischen 130 und 150 kJ/mol, abhängig vom Substituenten am Aromaten. Gasförmige und nichtflüchtige Zerfallsprodukte werden analysiert und deren Bildungsmechanismus diskutiert. Die nichtflüchtigen Zersetzungsprodukte entstehen größtenteils durch Reaktion der Fragmente der Ausgangsverbindung mit dem Lösungsmittel. Das in einem Fall (4) als Zersetzungsprodukt isolierte 7-Methylindazol legt nahe, die Fragmentierung der Azo-Verbindung über Aryldiazyl-Stufen zu formulieren.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19751080522
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  • 5
    Electronic Resource
    Electronic Resource
    Oligomerisierungsprodukte bei der olefin-metathese von mehrfach ungesättigten aliphatischen carbonsäureestern (1976)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 177 (1976), S. 39-47 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The olefin-metathesis of multiple unsaturated carboxylic esters like methyl linolate and methyl linolenate in the presence of WCl6/(CH3)4Sn catalyst leads to linear oligomeric olefines, mono- and diesters besides of a cyclic product. The reaction products were identified by mass spectrometry. The distribution of the linear products in equilibrium was calculated statistically and was compared with the experimental distribution.
    Notes: Die Olefin-Metathese von mehrfach ungesättigten Carbonsäureestern wie Linol- und Linolensäureester in Gegenwart eines WCl6/(CH3)4Sn-Katalysators führt neben einem cyclischen Produkt zu linearen oligomeren Olefinen, Mono- und Diestern. Die Produkte werden durch Massenspektrometrie identifiziert. Die sich im Gleichgewicht einstellende Verteilung der Linearprodukte wird statistisch berechnet und mit der experimentellen Verteilung verglichen.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1976.021770104
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  • 6
    Electronic Resource
    Electronic Resource
    Synthese und Charakterisierung von Copolymeren aus Azo-Initiatoren und Styrol (1976)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 177 (1976), S. 1357-1371 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Copolymers with azoinitiator functions were prepared from styrene and different arylazoalkylmalonodinitriles by copolymerization in emulsion, using redox-initiators. This type of copolymer can be used for syntheses of graft copolymers. The concentration of azo-groups per polymer chain, the polymerization rate, and the molecular weight of the isolated copolymers were determined as a function of the composition of the starting monomer mixture and the structure of the azo-compounds. It was tried to separate the crude product of the grafting reaction into the ungrafted backbone, the graft-copolymer, and the homopolymer.
    Notes: Aus Styrol und verschiedenen Arylazoalkylmalonodinitrilen wurden durch redoxini-tiierte Emulsionspolymerisation Copolymere hergestellt, die Azo-Initiatorgruppen enthalten. Diese Copolymere können zur Herstellung von Pfropfcopolymeren benutzt werden. Die Einbaurate der Azoverbindungen, die Polymerisationsgeschwindigkeit, sowie die Molekulargewichte der gebildeten Copolymere wurden in Abhängigkeit von der Zusammensetzung der Monomerengemische und der Struktur der Azoverbindungen untersucht. Es wurde versucht, das Rohprodukt der Pfropfung in die Bestandteile ungepfropftes Rückgrat, Pfropfcopolymer und Homopolymer aufzutrennen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1976.021770511
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  • 7
    Electronic Resource
    Electronic Resource
    Bestimmung von sequenzlängenverteilungen hydrierter polyalkenylene durch metathese-abbau, 1. Homogen hydriertes polybutadienHerrn Prof. Dr. Phil. Herbert Kölbel zum 70. Geburtstag gewidmet (1979)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 180 (1979), S. 315-323 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Partially hydrogenated 1,4-polybutadiene is degraded into GC-detectable reaction products after olefin-metathesis with 4-octene in the presence of WCI6/(CH3)4Sn. 1,4-polybutadiene is homogeneously hydrogenated with p-toluenesulfonohydrazide and serves as copolymer with non-hydrogenated and hydrogenated repeating units. Hydrogenated sequences up to an undecade are detectable. The experimental monomer sequence length distribution agrees satisfactorily with the theoretical one calculated under the assumption of an ideal statistical copolymer.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1979.021800203
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  • 8
    Electronic Resource
    Electronic Resource
    Azoinitiatoren, 98. Mitteilung: Oskar Nuyken, Robert Kerber, Makromol. Chem. 179, 2845 (1978). .Synthese und pfropfung azogruppenhaltiger polycarbonate (1979)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 180 (1979), S. 609-614 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Polycarbonate 3 was synthesized by copolymerisation of 4-(p-hydroxyphenylisopropyl)phenol with [3,5-Bis(hydroxymethyl)phenylazo]-methylmalonodinitrile (2a). This azo groups containing polycarbonate was employed as initiator for graft copolymerisations. The content of azo functions in the resulting copolymers was determined by 1H NMR, microanalysis, and DSC-measurements, and Mn by vapor pressure osmometry. Grafting was carried out with styrene in 1,4-dioxane and the resulting products were characterized by IR, 1H NMR, HPLC, and vapor pressure osmometry.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1979.021800304
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  • 9
    Electronic Resource
    Electronic Resource
    Estergruppenhaltige Polyalkenylene durch Olefin-Metathese (1976)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 177 (1976), S. 1349-1355 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The ring-opening polymerisation of ester group-substituted cycloolefines leads to linear polyalkenylenes with pendant ester groups in the presense of suitable metathesis-catalysts like WCl6/(CH3)4Sn. The monomers 9-ethoxycarbonyl-bicyclo[6.1.0]non-cis-4-ene (3), 13-ethoxycarbonyl-bicyclo[10.1.0]trideca-trans-4, trans-8-diene (5) and 3-ethoxycarbonyl-tricyclo[3.2.1.02,4]oct-6-ene (7) are obtained from the cycloolefines cis-1, cis-5-cyclooctadiene (2), cis-1, trans-5, trans-9-cyclododecatriene (4) and norbornadiene (6) via carbene reaction with ethyl diazoacetate. The corresponding polyalkenylenes (3a, 5a and 7a) show relatively high molecular weights. Their constitutions are determined spectroscopically and by gaschromatographic analysis of the degradation products after olefin-metathesis with a low molecular weight olefine (4-octene).
    Notes: Die ringöffnende Polymerisation von Estergruppen-substituierten Cycloolefinen in Gegenwart geeigneter Metathese-Katalysatoren wie WCl6/(CH3)4Sn führt zu linearen Polyalkenylenen mit seitenständigen Estergruppen. Die Ausgangsmonomeren 9-Äthoxycarbonyl-bicyclo[6.1.0]non-cis-4-en (3), 13-Äthoxycarbonyl-bicyclo[10.1.0]trideca-trans-4, trans-8-dien (5) und 3-Äthoxycarbonyl-tricyclo[3.2.1.02,4]oct-6-en (7) werden über eine Carbenreaktion mit Diazoessigsäureäthylester aus den Cycloolefinen cis-1, cis-5-Cyclooctadien (2), cis-1, trans-5, trans-9-Cyclododecatrien (4) und Norbornadien (6) erhalten. Die entsprechenden Polyalkenylene (3a, 5a sowie 7a) besitzen relativ hohe Molekularge-wichte. Ihre Konstitution wird spektroskopisch und durch gaschromatographische Analyse der Abbauprodukte nach Olefin-Metathese mit einem niedermolekularen Olefin (4-Octen) bestimmt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1976.021770510
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  • 10
    Electronic Resource
    Electronic Resource
    Franz patat zum 70. Geburtstag (1976)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 177 (1976), S. 1901-1903 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1976.021770701
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