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  • 1
    Electronic Resource
    Electronic Resource
    Reaction of piperidine with formaldehyde over alumina and spinel aluminates (1996)
    Springer
    Catalysis letters 38 (1996), S. 53-56 
    Details
    ISSN: 1572-879X
    Keywords: piperidine ; formaldehyde ; 3-alkylpyridine ; selective synthesis ; mechanism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The reaction of piperidine with formaldehyde over γ-alumina, Na+-γ-alumina, NiAl2O4 and CuAl2O4 was studied as a model system in order to understand the mechanism and selectivity of alkylpyridine formation from piperidine and carbonyl compounds. Along with the expected 3-picoline, 2-picoline and other products were also formed. The selectivity for 3-picoline was high on γ-alumina whereas on NiAl2O4, 2-picoline was selectively formed. The formation of the different products has been rationalized and a probable mechanism for the formation of 2-picoline has been presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00806899
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  • 2
    Electronic Resource
    Electronic Resource
    Thermal conductivity of La2CuO4, La2NiO4, and Nd2CuO4 in the semiconducting and metallic phases (1986)
    Springer
    International journal of thermophysics 7 (1986), S. 1091-1100 
    Details
    ISSN: 1572-9567
    Keywords: electrical conductivity ; La2CuO4 ; La2NiO4 ; Nd2CuO4 ; oxides ; phonons ; thermal conductivity ; thermal expansion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Thermal conductivity of polycrystalline La2CuO4, La2NiO4, and Nd2CuO4 was measured in the temperature range 300–1000 K. No anomaly in thermal conductivity has been observed during the semiconductor-to-metal transition of La2NiO4 or in the metallic phases of La2CuO4 and La2NiO4. A change of slope has been found, however, in the thermal conductivity of La2CuO4 at the crystallographic transition. The thermal conductivity of the oxides is mainly phononic in this temperature range.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00502380
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of a self-crosslinkable polymer from cardanol: Autooxidation of poly(cardanyl acrylate) to crosslinked film (1993)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 31 (1993), S. 1069-1073 
    Details
    ISSN: 0887-624X
    Keywords: cardanol ; cardanyl acrylate ; self-crosslinkable polymer ; autooxidation ; hydroperoxide ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Cardanyl acrylate (CA), a monomer that yields crosslinkable copolymers, was synthesized by the reaction of cardanol with acryloyl chloride. A linear polymer was obtained by solution polymerization of the monomer in toluene using 0.8% azobisisobutyronitrile as initiator. Upon removal of solvent, the polymer undergoes crosslinking on exposure to air (or UV light) to give an insoluble transparent film. However, in bulk and suspension polymerization the polymer undergoes in situ crosslinking in the absence of any crosslinking agent. The polymer was characterized by IR, NMR, DSC, and GPC. The crosslinking reaction of soluble polymer on exposure to air at ambient conditions was explained by the hydroperoxide theory. © 1993 John Wiley & Sons, Inc.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1993.080310429
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  • 4
    Electronic Resource
    Electronic Resource
    Spectral separation of two very closely related organic compounds by 1D TOCSY (1994)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 32 (1994), S. 452-457 
    Details
    ISSN: 0749-1581
    Keywords: NMR ; 1D TOCSY ; z-Filtering ; 2,7-Dioxatetracyclo[3.3.04,9.08,11]undeca-3,6-dione ; 8,10,11-Trioxapentacyclo[5.4.1.02,6.04,11.05,9]dodecane ; 2,8-Dioxatetracyclo[3.3.3.06.0.03,10]undecan-4-ol ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The use of one-dimensional total correlation spectroscopy (1D TOCSY) combined with the z-filtration technique to generate pure phase subspectra of individual isomers from the spectrum of the corresponding mixture without any chemical separation of the mixture is described. A straightforward spectral assignment is achieved for the isomers obtained on lithium aluminium hydride reduction of 2,7-dioxatetracyclo[3.3.04,9.08,11] undeca-3,6-dione (dilactone) by studying the subspectrum of each isomer as a function of the propagation time of magnetization through the network of coupled protons.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260320804
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    Paper (German National Licenses)
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