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  • 1
    Electronic Resource
    Electronic Resource
    Untersuchungen in der Cyclobutanreihe, XXIII. Cyclisierende Trimerisierung von tert.-Butylacetylen zu einem Dewar-Benzol-Palladiumchlorid-Komplex (1969)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 102 (1969), S. 3996-4007 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus tert.-Butylacetylen und (C6H5CN)2·PdCl2 bildet sich der Tri-tert.-butyl-Dewar-Benzolpalladiumchlorid-Komplex 1. Bei dessen reduktiver Zersetzung entsteht ein Monochlorderivat mit Bicyclo[2.2.0]hexen-Skelett (10). In Gegenwart von Brom oder Jod geht 1 in ein Dichlorid mit Bicyclo[3.1.0]hexen-Skelett (19) über. Unter dem Einfluß von Säuren entsteht aus 10 ein Fulven 29.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19691021206
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  • 2
    Electronic Resource
    Electronic Resource
    Neuuntersuchungen über die Abbauprodukte des aus tert.-Butylacetylen und Palladiumchlorid erhaltenen Komplexes (1971)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 3486-3497 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Reinvestigation of the Products Obtained from the Complexes of tert-Butylacetylene with Palladium ChlorideThe structure of the compounds 3 and 4 obtained from the complexes 1 and 2 by treating with hydrogen or bromine were reinvestigated. For 3 and 4 now 1.2-dihydrofulvene structures are proposed. The previously proposed structures of type A and B were excluded. It was established that the fulvene obtained from 3 and HCl has a 1.3.6-tri-tert-butylfulvene structure. Chemical and spectroscopical supports for this new structures are reported.
    Notes: Die Struktur der aus den Komplexen 1 und 2 bei der Umsetzung mit Brom oder Wasserstoff erhaltenen Verbindungen 3 und 4 wurde neu untersucht. Diesen Verbindungen wird eine monocyclische Struktur mit 1.2-Dihydro-fulven-Gerüst zugeschrieben, was die früher vorgeschlagenen Formeln vom Typus A und B ausschließt. Demnach erwies sich 7 (aus 3 und Chlorwasserstoff) als 1.3.6-Tri-tert.-butyl-fulven. Chemische und spektroskopische Beweise zur Stütze der vorgeschlagenen Strukturen werden wiedergegeben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19711041113
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  • 3
    Electronic Resource
    Electronic Resource
    Reaktionen der Acetylene mit Übergangsmetallen, II. Umsetzung von 2.5.5-Trimethyl-hexin-(3)-ol-(2) mit Bis(benzonitril)-palladiumchlorid (1972)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 2375-2388 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Acetylenes with Transition Metals, II. Treatment of 2.5.5-Trimethylhex-3-yn-2-ol with Bis(benzonitril)palladium ChlorideReductive decomposition of the complex (C18H29OPdCl)2, obtained from the hexynol 1 with (C6H5CN)2PdCl2, yielded the furan 8. This on oxidation gave the diketone 9 and on treatment with bromine the furans 11, 13, 15 and the diketone 17. The diketone 9 cyclisized with bromine to the furan 13. The formation of the furan ring from α.β-unsaturated diketones with HBr is discussed.
    Notes: Bei der reduktiven Zersetzung des aus dem Hexinol 1 mit (C6H5CN)2PdCl2 dargestellten Komplexes (C18H29OPdCl)2 entsteht das Furan 8. Die Oxydation von 8 führt zum Diketon 9 und die Umsetzung mit Brom zu den Furanen 11, 13, 15 und zum Diketon 17. Das Diketon 9 wird durch Brom zum Furan 13 cyclisiert. Der Ringschluß zum Furan aus den α.β-ungesättigten Diketonen in Gegenwart von HBr wird diskutiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19721050731
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  • 4
    Electronic Resource
    Electronic Resource
    Reaktionen der Acetylene mit übergangsmetallen, IV. Die Struktur des aus 2,5,5-Trimethyl-3-hexin-2-ol und Bis(benzonitril)palladiumchlorid erhaltenen Komplexes (1975)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 1830-1838 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Acetylenes with Transition Metals, IV. Structure of the Complex Obtained from 2,5,5-Trimethy-3-hexin-2-ol and Bis(benzonitril)palladium ChlorideBy reaction of 1 with (C6H5CN)2-PdCl2 results the complex 15 which furthermore changes in the stable complex 3. The structures 3 and 15 were supported by chemical behaviour and spectroscopic data.
    Notes: Bei der Umsetzung von 1 mit Bis(benzonitril)palladiumchlorid wird als erstes Reaktionsprodukt der Komplex 15 isoliert, der sich weiter in den Komplex 3 umwandelt. Die Strukturen 3 und 15 werden chemisch und spektroskopisch untermauert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19751080607
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of exogenous fatty acids on growth, membrane fluidity, and phospholipid fatty acid composition in yeast (1981)
    New York, NY : Wiley-Blackwell
    Journal of Supramolecular Structure and Cellular Biochemistry 15 (1981), S. 119-128 
    Details
    ISSN: 0275-3723
    Keywords: yeast growth ; fatty acids ; phospholipids ; lipid fluidity ; Chemistry ; Molecular Cell Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: The growth response of a double-mutant fatty acid auxotroph of yeast Saccharomyces cerevisiae to exogenous saturated fatty acids of a homologous series from 12:0 to 16:0, each supplied with oleate, linoleate, linolenate, or cis-Δ11- eicosenoate, cannot be explained in terms of the efficiency of incorporation of the fatty acids into phospholipids or alteration of membrane fluidity. There is, however, a negative correlation between growth and levels of 12:0 plus 13:0 in phospholipids, as well as a positive correlation between growth and levels of 14:0, 1 5:0, and 1 6:0. We, therefore, conclude that the predominant factor in these phospholipid fatty acyl chain modifications is maintenance of an optimal concentration of C14:0 through C16:0 in phospholipids of this organism.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jsscb.1981.380150203
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  • 6
    Electronic Resource
    Electronic Resource
    Untersuchungen in der Cyclobutanreihe, II. Zur Kenntnis des Cyclobutadiens (1957)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 90 (1957), S. 1857-1868 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Beim Hofmannschen Abbau des Bis-hydroxymethylats des 1.3-Bis-dimethyl-amino-cyclobutans bildet sich statt des erwarteten Cyclobutadiens, Butadien. Dieser Kohlenwasserstoff entsteht ebenfalls an Stelle des Cyclobutadiens bei der thermischen Spaltung der aus Cyclooctatetraen und verschiedenen Philodienen gewonnenen Addukte von Reppe und Mitarbeitern. Die Aufnahme von zwei Wasserstoffatomen aus Nachbarmolekülen scheint somit eine allgemeine Stabilisierungsreaktion des Cyclobutadiens zu sein. Ein Teil des an der Spaltung nicht beteiligten Addukts verliert zwei Atome Wasserstoff und erleidet dabei eine ungewöhnliche intramolekulare Umlagerung zu aromatischen Verbindungen, unter intermediärem Auftreten eines zehngliedrigen Ringes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19570900925
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  • 7
    Electronic Resource
    Electronic Resource
    Untersuchungen in der Cyclobutanreihe, IV. Über einen Silbernitrat-Komplex C4H4·AgNO3 (1959)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 92 (1959), S. 1088-1091 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch Abspaltung von Brom aus 1.2.3.4-Tetrabrom-cyclobutan mittels Lithiumamalgams wurde eine unbeständige Quecksilberverbindung erhalten, welche mit Silbernitrat in einen kristallisierten, stabilen Komplex, C4H4·AgNO3, übergeht.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19590920512
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  • 8
    Electronic Resource
    Electronic Resource
    Use of multiple regression analysis to develop predictive models for failure times of adhesive bonds at constant stress (1974)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 18 (1974), S. 555-565 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Predictive models were developed for failure times of adhesively bonded titanium and aluminum under a constant stress. The independent variables in the equations were temperature, relative humidity, and stress. The predictive equations were developed using multiple regression analysis which was performed by computer. A comparison of actual failure times with those predicted by the models gave at least an order-of-magnitude agreement. A previously developed reaction rate model was also verified by regression techniques.
    Additional Material: 8 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1974.070180220
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  • 9
    Electronic Resource
    Electronic Resource
    A continuous liquid-liquid extraction system coupled on-line with capillary gas chromatography for environmental and ecotoxicological analysis (1997)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 20 (1997), S. 325-332 
    Details
    ISSN: 0935-6304
    Keywords: Capillary GC ; Continuous liquid-liquid extraction ; Environmental applications ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The applicability of a liquid-liquid extraction system which is coupled on-line with a capillary gas chromatograph was studied for environmental and ecotoxicological analyses. The optimized and automated system was used for the determination of apolar and rather non-volatile organic compounds in aqueous samples. Relevant aspects of sample introduction, phase separation and selection of extraction solvent are discussed. Three routine-tipe applications are described, viz. an improved method for the determination of hexachlorocyclohexanes in ground water and the determination of the so-called NCC-ether and ACC-ether in ecotoxicological studies. Depending on the application studied, the concentration levels varied from 0.1 to 6000 μg/I, using ECD and/or FID detection. Typical coefficients of variation obtained with the total extraction-GC procedure were 2-25%.The system was found to be rugged, it saves time compared with set-ups involving off-line liquid-liquid extraction and considerably reduces the manual work load.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240200606
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  • 10
    Electronic Resource
    Electronic Resource
    Reversed-phase liquid chromatography coupled on-line with capillary gas chromatography II. Use of a solvent vapor exit to increase introduction volumes and introduction rates into the gas chromatograph (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Microcolumn Separations 6 (1994), S. 207-215 
    Details
    ISSN: 1040-7685
    Keywords: capillary GC ; reversed-phase LC ; on-line coupling ; solvent vapor exit ; pressure-balanced carrier gas system ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A large-volume introduction system for capillary gas chromatography (GC) is described which can be coupled on-line with reversed-phase liquid chromatography (LC) using 2 mm i.d. LC columns. An on-column interface with a special retention gap, coated with a very thin film (0.02 μm) of Carbowax was used. Insertion of a solvent vapor exit before the analytical gas chromatography column allowed the solvent evaporation rate for an azeotropic acetonitrile/water mixture (84:16, v/v) to increase from 20 to 175 μL min-1 at 91°C and 150 kPa inlet pressure. A volume of 200 μL of this mixture containing phenanthrene and the potential basic drug eltoprazine, could be injected into the retention gap at introduction rates up to 200 μL min-1, under partially concurrent solvent evaporation conditions. Repeatability (CV = 2.4%) and linearity (at least 10-1000 ng mL-1) were satisfactory. The Carbowax-coated retention gap has a relatively large retention power for the polar solute. This means that the solvent can be completely evaporated through the vapor exit without loss of analyte. With apolar solutes, losses will occur if evaporation is unduly prolonged. In order to allow the use of a nitrogen-phosphorus detector, a special pressure-balanced carrier gas circuit was designed and tested for total solvent-free performance of the detector. With this set-up, 150 μL injections of eltoprazine in the acetonitrile/water azeotrope were made at an introduction rate of 200 μL min-1. No traces of acetonitrile were detected, while analyte detectability was 20-fold higher than with the FID.Finally, the practicability of reversed-phase LC-GC was demonstrated by on-line heart-cutting of the phenanthrene-containing fraction from a 2 mm i.d. LC column using acetonitrile/water (84:16, v/v) as eluent, and analyzing it by capillary GC-FID.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mcs.1220060303
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