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  • 1
    Electronic Resource
    Electronic Resource
    Darstellung und Schwingungsspektren des dimeren (Isopropylidenamino)dimethylborans, -alans und -gallans (1977)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 3935-3942 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and Vibrational Spectra of Dimeric (Isopropylidenamino)dimethylborane, -alane, and -gallaneN-Chloro-2-propanimine (1) reacts with trimethylboron, -aluminium, and -gallium to form the dimeric imino compounds [Me2C=N—MMe2]2 (M=B, Al, Ga) (2-4), which, according to the vibrational spectra, occur as M2N2 four-rings of the point group D2h. Also, the vibrational spectrum of 1 is reported.
    Notes: N-Chlor-2-propanimin (1) reagiert mit den Trimethylverbindungen von Bor, Aluminium und Gallium unter Bildung der dimeren (Isopropylidenamino)dimethyl-Derivate [Me2C=N—MMe2]2 (M=B, Al, Ga) (2-4), die nach den Schwingungsspektren zentrosymmetrische M2N2- Vierringe (Symmetrie D2h) bilden. Das Schwingungsspektrum von 1 wird ebenfalls mitgeteilt.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19771101225
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesen von Gallenfarbstoffen, VI: Totalsynthese des (+)(4R,16R)- und (-)(4R,16S)-[18-Vinyl]mesourobilin IXα-dimethylesters (1978)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 486-501 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses of Bile Pigments, VI: Total Synthesis of (+)(4R,16R)- and (-)(4R,16S)-[18-Vinyl]mesourobilin IXα Dimethyl EstersRacem. methyl 5′-tert-butoxycarbonyl-[4-vinyl]isoneobilirubinate (7a) has been synthesized by oxidation of the 5(2H)-dipyrrylmethanone-selenide 5m with hydrogen peroxide and subsequent thermal decomposition of the formed selenoxide. The corresponding 5′-formyl derivative 7b was condensed with the known (+)(R)-5′-carboxyneobilirubinic acid (6a) yielding, after esterification with diazomethane, the two diastereomeric (+)(4R,16R)- and (-)(4R,16S)-[18-vinyl]mesourobilin IXα dimethyl esters (8a and 8b, respectively) which were for the first time fully characterized on the basis of their CD, ORD, 1H-NMR, UV/VIS, and mass spectra. In the course of this work 4-methyl-3-vinyl-3-pyrrolin-2-one (3) was prepared in 20% yield from 2b.
    Notes: Racem. 5′-tert-Butoxycarbonyl-[4-vinyl]isoneobilirubinsäure-methylester (7a) wurde durch Oxidation des 5(2H)-Dipyrrylmethanon-selenids 5m zum Selenoxid und dessen thermische Zersetzung synthetisiert. Durch Kondensation des entsprechenden 5′-Formyl-Derivats 7b mit der bekannten (+)(R)-5′-Carboxy-neobilirubinsäure (6a) und darauffolgende Veresterung des Reaktionsproduktes wurden die zwei diastereomeren (+)(4R,16R)- und (-)(4R,16S)-[18-Vinyl]mesourobilin IXα-dimethylester (8a bzw. 8b) zum ersten Mal dargestellt und anhand ihrer CD-, ORD-, 1H-NMR-, UV/VIS- und Massenspektren charakterisiert. Weiterhin wurde das schwer zugängliche 4-Methyl-3-vinyl-3-pyrrolin-2-on (3) aus der bekannten 2-Oxo-3-pyrrolin-3-propionsäure 2b in 20 proz. Ausbeute dargestellt.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19781110208
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  • 3
    Electronic Resource
    Electronic Resource
    Calculation of intermolecular interactions within the PCILO framework (1976)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 10 (1976), S. 909-916 
    Details
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The PCILO method was used to calculate the intermolecular interaction of London-van der Waals type, hydrogen bonding type, and charge transfer type interactions, respectively. The stabilization energies of the calculated supermolecules are: 0.85 kcal · mole-1 for the nonane dimer,4.15 kcal · mole-1 for the water dimer, and3.60 kcal · mole-1 for the butene-2-cis-Li+ complex.The analysis of the individual contributions of the energy reflects well the mechanism of the intermolecular interaction.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/qua.560100519
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  • 4
    Electronic Resource
    Electronic Resource
    Theoretical conformational analysis considering solvent effects (1979)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 16 (1979), S. 379-386 
    Details
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The conformational structure of some biologically important compounds (formamide, 1-methyl-1,4-dihydronicotinamide, and chlorocholine) was examined using quantum-chemical methods. For each of the systems studied a theoretical model (supermolecule approximation, classical continuum model, or hydration shell model) was selected to estimate the influence of solvents on the conformational structure.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/qua.560160217
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  • 5
    Electronic Resource
    Electronic Resource
    PCILO calculations on hydrogen bonded complexes. Dimers involving second row atoms (1977)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 12 (1977), S. 805-811 
    Details
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The PCILO method was used to study systems with the following types of intermolecular hydrogen bonds, involving 2nd row atoms: N…H—S, S…H—S, N…H—Cl, Cl…H—F, Cl…H—Cl, P…H—N, P…H—P, P…H—F, S…H—F.In all the cases calculated, the PCILO method yields an accurate qualitative description of the stabilization energies and to some extent quantitatively good agreement with reliable ab initio and experimental results. The corresponding equilibrium distances are in almost all cases smaller (up to 0.6 Å) than the ab initio values of the same compounds.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/qua.560120504
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  • 6
    Electronic Resource
    Electronic Resource
    Darstellung, Schwingungsspektrum und Kristallstruktur des dimeren (Isopropylidenamino) dimethylindiums (1979)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 112 (1979), S. 2039-2044 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation, Vibrational Spectrum, and Crystal Structure of Dimeric (Isopropylideneamino) dimethylindiumThe title compound [Me2C=N—InMe2]2 was prepared from N-chloro-2-propanimine and trimethylindium. Its IR and Raman spectra were assigned; together with the 1H-NMR spectrum and the mass spectrum a centrosymmetric molecular structure with a four-membered (InN)2 ring was deduced. This was confirmed by an X-ray structure determination, according to which there exist two dimeric molecules per unit cell in the space group P21/c. The structure was refined with 958 reflexions up to a residual index of R = 0.024.
    Notes: Die Titelverbindung [Me2C=N-InMe2]2 wurde aus N-Chlor-2-propanimin und Trimethylindium synthetisiert. Das IR-und Raman-Spektrum wurde zugeordnet; zusammen mit dem 1H-NMR- und dem Massenspektrum ergibt sich eine zentrosymmetrische Molekülstruktur mit einem (InN)2-Vierring. Dies wird durch die Röntgenstrukturbestimmung bestätigt, nach der eine Struktur mit zwei dimeren Molekülen pro Elementarzelle in der Raumgruppe P21/c vorliegt. Die Struktur wurde bis zu einem Übereinstimmungsindex von R = 0.024 für 958 Reflexe verfeinert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19791120614
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  • 7
    Electronic Resource
    Electronic Resource
    Ignition on catalytic wires: Kinetic parameter determination by the heated-gas technique (1975)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 21 (1975), S. 176-177 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690210127
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  • 8
    Electronic Resource
    Electronic Resource
    Analysis of kinetic data for heterogeneous reactions (1956)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 2 (1956), S. 59-62 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The chemical engineer frequently has to correlate kinetic data for heterogeneous reactions simply and accurately in order to make useful predictions of reaction rates over a range of conditions. The Langmuir-Hinshelwood approach, which is frequently used for this purpose, does not have the theoretical validity commonly attributed to it, and its use leads to unnecessary mathematical complexity. A simpler method of analysis is suggested which is based on power dependencies of the rate on concetrations, the powers being restricted to integral of half-integral values. The data for several reactions are shown to be adquately correlated by the suggested procedure, which is simple and convenient.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690020112
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  • 9
    Electronic Resource
    Electronic Resource
    The effect of flow maldistribution on conversion in a catalytic packed-bed reactor. Part II. Experimental studies (1976)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 22 (1976), S. 1027-1032 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The modeling equations formulated for a catalytic packed-bed reactor with distributed resistance to flow have been applied to the alumina catalyzed isomerization of 1-butene to cis- and trans-2-butene. Flow maldistribution was deliberately created in a 5.25 cm I.D. reactor by packing different radial sections with alumina particles of different size. Effluent gas composition, monitored by gas chromatography, was found to vary with radial position in a manner consistent with the modeling equations and with the reaction rate constant previously established in a microreactor.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690220612
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  • 10
    Electronic Resource
    Electronic Resource
    The effect of flow maldistribution on conversion in a catalytic packed-bed reactor. Part I. Analysis (1976)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 22 (1976), S. 1021-1027 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Through the statement of the vectorial form of the Ergun equation, combined with a differential component balance, a formulation was developed describing the velocity fields and reactant concentration profiles in an isothermal packed-bed reactor in which the gas flow is nonuniform. This flow maldistribution was caused by both the preferential flow near the wall, inherent in most systems, and by the deliberate arrangement of the solid packing in the bed. The numerical solution of the governing equations showed that a nonuniform flow field had a very strong effect in distorting the concentration isopleths, particularly at intermediate conversion levels.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690220611
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