ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and Properties of the Sulfur Analogs of N-Hexyltetraoxyethyleneglycols (1988)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 25-26 (Jan. 1988), p. 343-346 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/02/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.25-26.343.pdf
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    1-Phenylamino-2-imidazoline und 1,2,5,6-Tetrahydro-1,2,4-triazine aus N-(2-Chloralkyl)-imidchloriden (1981)
    Springer
    Monatshefte für Chemie 112 (1981), S. 959-971 
    Details
    ISSN: 1434-4475
    Keywords: Amidrazones ; 13C-NMR ; 1H-NMR ; 1-Phenylamino-2-imidazolines ; Tetrahydro-1,2,4-triazines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract 1-Phenylamino-2-imidazolines3 and 1,2,5,6-tetrahydro-1,2,4-triazines4, 5 and6 are synthesized from N-(2-chloralkyl)-imidchlorides1 and phenylhydrazines. As intermediates are obtained the hydrochlorides of amidrazones2 which cyclise. The structure of the different heterocyclic systems are determined by1H- and13C-NMR-spectroscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00905067
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Influence of ligand structure and solvent effects on complexation of neutral guests by several crown ethers (1994)
    Springer
    Journal of solution chemistry 23 (1994), S. 53-61 
    Details
    ISSN: 1572-8927
    Keywords: Crown ethers ; benzocrown ethers ; non-charged complexes ; host-guest complexes ; calorimetric titration
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The formation of complexes between crown ethers and acetonitrile, chloroform, and nitromethane were investigated in carbon tetrachloride at 25°C. A significant influence of the ring size on the selectivity of the host is evident. The host 18-crown-6 forms complexes for which the reaction enthalpy and entropy are quite high. Host molecules with benzene side groups form complexes of lower reaction enthalpy and entropy and therefore the complexes formed are less stable than that of the analogous crown ethers without aromatic groups. Solvent effects on the stability constant K, the reaction enthalpy ΔH, and the reaction entropy ΔS were studied for the complexation of malonitrile by 18-crown-6. The reaction enthalpy and entropy values change in accordance with the dielectric constant of the solvent used, but no overall effect on complex stability with change in solvent dielectric constant was observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00972607
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Kupferdesaktivierende wirkung von chelatkomplexbildnern in strahlenvernetztem polyethylen niedriger dichte (1992)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 199 (1992), S. 103-117 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Complex-forming agents for copper being of interest as reagents in analytical chemistry and for liquid-liquid extraction were tested with regard to their effectiveness as copper deactivators in crosslinked low density polyethylene (XLDPE) by determining the induction period in the oxygen uptake of XLDPE/Cu/XLDPE-sandwiches at 165°C. Besides acylated hydrazines, a class of substances already known for efficient metal deactivation, several groups of chelating agents were investigated. Above all, the 2-(2-hydroxyphenyl)imidazoles turned out to be efficient copper deactivators in XLDPE. Compared to them, the 2-(2-hydroxyphenyl)oxazole, -thiazole and -oxadiazole with very similar chemical structure but without mobile hydrogen at the five-membered ring are ineffective.
    Notes: Komplexbildner für Kupfer, die als Nachweisreagenzien in der Analytik und als Reagenzien für die Flüssig-Flussig-Extraktion interessant sind, wurden als Kupferdesaktivatoren in vernetztem Polyethylen niedriger Dichte (XLDPE) durch Bestimmung der Induktionszeiten der Sauerstoffaufnahme von XLDPE/Cu/XLDPE-Sandwichproben bei 165 °C getestet. Neben acylierten Hydrazinen, einer für wirksame Metalldesaktivierung bereits bekannten Stoffklasse, wurden mehrere Gruppen von Chelatkomplexbildnern untersucht, wobei sich vor allem die 2-(2-Hydroxyphenyl)imidazole als wirksame Kupferdesaktivatoren in XLDPE erweisen. 2-(2-Hydroxyphenyl)oxazol, -thiazol und -oxadiazol, denen bei sehr ühnlicher chemischer Struktur der bewegliche Wasserstoff am Fünfring fehlt, sind dagegen unwirksam.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1992.051990109
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Isoazalene, III. Tricyclische Isoazalene aus 2-Aza-fluorenenDie 2-Aza-fluorene werden im folgenden mit den gleichen römischen Zahlen bezeichnet wie in der II. Mitteilung; solche römischen Zahlen erscheinen in eckigen Klammern. (1962)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 652 (1962), S. 212-217 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Aus 2-Aza-fluorenen wurden durch Quaternierung und nachfolgende Behandlung mit Laugen tricyclische Isoazalene erhalten. Einige Vertreter dieser neuen Körperklasse sind in reinem kristallisiertem Zustand überraschend beständig. Die Absorptionsmaxima ihrer tieffarbigen, wenig haltbaren Lösungen sind substituentenabhängig. Aryle haben im N-haltigen Sechsring hypsochromen, im Fünfring bathochromen Einfluß. Die Thienogruppe wirkt im Vergleich zur Benzogruppe stark hypsochrom.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.19626520125
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Zum Einfluß von arylständigen Substituenten auf die Komplexbildung von Monobenzokronenethern mit Alkalimetallionen in Methanol und Aceton (1994)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 336 (1994), S. 5-10 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Influence of Aryl-bonded Substituents on Complex Formation of Benzocrown Ethers with Alkali Metal Ions in Methanol and Acetone SolutionsThe influence of aryl-bonded substituents upon the complex formation of monobenzocrown ethers towards alkali metal ions in methanol and acetone solutions are investigated by using calorimetric and potentiometric titration. A different complexation behaviour of the ligands in acetone and methanol was found. In the case of the 1:1 complexation of Na+ a correlation between substiuent effects and stability constants in acetone was noticed, however, the influence of substituents upon complex stability is weak. In methanol solutions no similar correlation could be established. During sandwich complexation of K+ in methanol, no significant substituent influences on K1 and K2 were observed. On the other hand, a considerable increase of ΔH2 for both the electron accepting and electron releasing substituents was found, probably caused by changes in ligand-cation solvation due to the substituents.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19943360103
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Olefinreaktionen in Gegenwart wolfram- und molybdänhaltiger Katalysatorsysteme vom Ziegler-Natta-Typ (1978)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 320 (1978), S. 283-290 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions of Alkenes in the Presence of Tungsten- and Molybdenum-containing Ziegler-Natta-CatalystsIn connection with investigations of reactions of alkenes under the conditions of metathesis we studied the reactions of a mixture of 2-pentene/toluene in presence of the catalytic systems WCl6/EtAlCl2 and MoCl5/EtAlCl2 in homogeneous liquid phase.Alkylation of toluene, metathesis of 2-pentene and also indirect isomerisation of double bonds have been determined in dependence of the molar proportions of 2-pentene/MeClx, toluene/2-pentene, and MeClx/EtAlCl2, the addition order (“formation”) of reactants, the “building time” of catalytic system and the reaction time.Compositions of the reaction mixtures have been determined by GLC.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19783200216
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Über den Einfluß einiger Versuchsparameter auf die homogen durch WCl6-EtAlCl2 katalysierte Olefinmetathese von Penten-(2) (1977)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 319 (1977), S. 790-798 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: About the Influence of Some Experimentally Parameters in the Homogeneous Catalyzed Metathesis of Pentene-(2) by WCl6-EtAlCl2The metathesis of a cis-trans-mixture of pentene-(2) was studied in presence of the catalytic active system WCl6-EtAlCl2, which was formed in situ. The influence of different solvents and the additiones of Lewis bases was examined. In a further study we established the dependence of the experimentally obtained results on various ratios of compounds in the reaction desposits. In some cases alkylation of aromatic solvents was observed under conditions of olefine metathesis. All reactions were carried out in homogeneous solution.
    Notes: Am Beispiel der Metathesereaktion eines cis-trans-Gemisches von Penten-(2) mit dem in situ aus Wolfram-(VI)-chlorid und Äthylaluminiumdichlorid (EtAlCl2) gebildeten und in homogener Flüssigphase vorliegenden Katalysatorsystems wurde der Einfluß verschiedener Lösungsmittel, des Zusatzes von Lewisbasen und verschiedener Molverhältnisse von Komponenten der Reaktionsansätze untersucht. In einigen Fällen wurde neben der Metathesereaktion eine Alkylierung aromatischer Lösungsmittel beobachtet.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19773190515
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Über den Mechanismus der nucleophilen Substitutionen an Bischlornitrosoverbindungen und α-ChloroximenDr.-Ing. Karl Smeykal zum 65. Geburtstage gewidmet (1965)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 29 (1965), S. 123-141 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Durch kinetische Messungen in Verbindung mit Konkurrenzreaktionen konnte nachgewiesen werden, daß Bischlornitrosoverbindungen, die aus NOCl und Olefinen zugänglich sind, ebenso wie die entsprechenden α-Chloroxime mit nucleophilen Agenzien nach einem Eliminierungs-Additions-Mechanismus reagieren. Die als Zwischenprodukte auftretenden Nitrosoolefine konnten UV-spektroskopisch nachgewiesen werden. Dimere Nitrosoolefine wurden als definierte Verbindungen aus den NOCl-Addukten einiger Aryläthylene gewonnen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19650290302
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Isoazalene, I. 4-Aryl-3-carboxy-pyridine als Ausgangssubstanzen für N-Methyl-1.2-benzisoazalene (1962)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 652 (1962), S. 192-203 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Als Ausgangsprodukte für die Synthese von N-Methyl-1.2-benzisoazalenen wurden 3-Carboxy-pyridine mit carbo- oder heterocyclischen Resten in 4-Stellung (4-Aryl-nicotinsäuren, Tab. 5) in einer 5 stufigen Synthese dargestellt.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.19626520123
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...