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
Filter
  • Organic Chemistry  (1,383)
  • Animals
  • 1995-1999
  • 1980-1984  (1,138)
  • 1975-1979  (688)
  • 1982  (1,138)
  • 1977  (688)
Collection
Keywords
Publisher
Years
  • 1995-1999
  • 1980-1984  (1,138)
  • 1975-1979  (688)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Untersuchungen über den Thermischen Zerfall von n-Dodecylcyclopentan in der Gasphase (1982)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 324 (1982), S. 964-972 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Investigations on the Thermal Decomposition of n-Dodecylcyclopentane in the Gas PhaseIn the thermal decomposition of n-dodecylcyclopentane at 670 and 750°C in a laboratory tubular reactor mixtures of hydrogen and 57 and 113 hydrocarbons respectively are formed. The mixtures have been analyzed and identified by capillary gas chromatography and by mass spectrometry. The distribution of the reaction products is used for mechanistic discussions.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19823240615
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Formation and dissociation mechanism of amide complexes. VPart IV, see [1]. Interconversion of dimeric and monomeric Cu2+-complexes with 1,8-diamino-3,6-diaza-2,7-octanedione: Comparison between the reactivity of terminal and internal amide groups (1982)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 65 (1982), S. 753-761 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The protonation and deprotonation rates of the coordinated amide groups in the Cu2+-complexes of 1,8-diamino-3,6-diaza-2,7-octanedione (DED = L) have been studied by stopped-flow techniques. Starting at low pH from Cu2+ and DED the dimeric Cu2L24+-complex, fully formed within the mixing time of the stopped-flow instrument, reacts in two consecutive steps to yield the final product CuLH-2. The rate constants of the forward and backward reactions have been determined and are given in Table 1. The intermediate was identified as Cu2L2H-22+ by measuring its VIS.-absorption spectrum.The rate constants for the interconversion of the amide groups from the O- to the N-coordinated form in the Cu2+-complexes of DED, 2,10-dioxo-1, 4, 8, 11 tetraazaundecane (DANA) and triglycine (TRIGLY) are compared with each other. It is shown that these rate constants are similar, no matter whether the amide group is terminal or internal as long as the rotation is easily possible as is the case in the dimeric species Cu2L24+ and Cu2L2H-22+. However, for CuLH-2 the inter-conversion only takes place after opening of one of the chelate rings in a rapid protonation preequilibrium.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19820650313
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Synthese von cis- und trans-Eninen in der Reihe der 12-und 15-Ringe (1982)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1982 (1982), S. 1366-1374 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of cis- and trans-Enynes in the Class of 12- and 15-membered Ring SystemsSynthesis of (E)-1-cyclododecen-3-yne (E-2a) leads to the isolation of the first trans-enyne with geometrical ring strain. E-2a isomerizes thermally to give the Z-configuration Z-2a in a very smooth reaction. For systematical investigations the 15-membered ring enynes E-5a and Z-5a were generated. They behave like openchained 1,3-enynes.
    Notes: Die Synthese von (E)-1-Cyclododecen-3-in (E-2a) führt zur Isolierung des ersten trans-Enins mit geometrischer Ringspannung. E-2a wandelt sich thermisch leicht in die Z-Konfiguration Z-2a um. Zur systematischen Untersuchung werden die 15-Ring-Enine E-5a und Z-5a hergestellt. Sie verhalten sich wie offenkettige 1,3-Enine.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198219820713
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Thalliumverbindungen als Katalysatoren für Umesterungen mit Glycidol und für Esteraustauschreaktionen mit Glycidylacetat (1977)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 60 (1977), S. 1845-1860 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Thallium compounds as catalysts for transesterifications and ester exchange reactionsThe transesterification of di-, tri- and tetracarboxylic alkyl esters with 2,3-epoxy-propanol was investigated in the presence of various metal compounds as catalysts. It was found that only thallium compounds catalyse the reactions under mild conditions without decomposition of 2,3-epoxypropanol. Many thallium compounds also proved to be very good catalysts for the reactions of 2,3-epoxypropanol with alkoxysilanes and the ester exchange reactions of di-, tri- and tetracarboxylic alkyl esters with 2,3-epoxypropyl-acetate.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19770600603
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Folgeprodukte halogenierter Aldehyde. XI [1]. Substitutionen am 2,5-Bis-trichlormethyl- und 2-Trichlormethyl-5-dichlormethylen-1,3-dioxolan-4-on-oxim (1977)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 319 (1977), S. 317-323 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Derivatives of Halogenated Aldehydes. XI. Substitution Reactions of 2,5-Bis-Trichloromethyl- and 2-Trichloromethyl-5-dichloromethylene-1,3-dioxolan-4-one Oxime2,5-Bis-trichloromethyl- (1) and 2-trichloromethyl-5-dichloromethylene-1,3-dioxolan-4-one oxime 2 are acylated with acyl halides, alkyl chlorocarbonates and N,N-dimethylcarbamyl chloride to give the corresponding O-acyl oximes 4-6, 9, 11 and 13. The addition of the oximes 1 and 2 to isocyanates yields the oxime carbamates 7 and 10, and the addition to N-acetyl-2,2,2-trichloroacetaldimine leads to the O-(1-acetamino-2,2,2-trichloroethyl) oximes 8 and 12. Oxime 2 forms a sodium salt 3 which gives the O-alkyl (15), the O-aryl (16) and the O-sulphonyl oximes (14) by reactions with alkyl halides or dialkyl sulfates, with activated aryl halides or with sulphonyl chlorides, respectively.
    Notes: 2,5-Bis-trichlormethyl- (1) und 2-Trichlormethyl-5-dichlormethylen-1,3-dioxolan-4-on-oxim 2 werden durch Acylieren mit Carbonsäurechloriden, Chlorkohlensäureestern und N,N-Dimethylcarbamoylchlorid in die entsprechenden O-Acyl-oxime 4-6, 9, 11 und 13 übergeführt. Durch Addition der Oxime 1 und 2 an Isocyanate entstehen die Oxim-carbamate 7 und 10 und durch Addition an N-Acetyl-2,2,2-trichloracetaldimin die O-(1-Acetamino-2,2,2-trichloräthyl)-oxime 8 und 12. Das Oxim 2 bildet ein Natriumsalz 3, das bei den Umsetzungen mit Alkylhalogeniden oder Dialkylsulfaten die O-Alkyl-oxime 15, mit aktivierten Arylhalogeniden die O-Aryl-oxime 16 und mit Sulfonsäurechloriden die O-Sulfonyl-oxime 14 ergibt.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19773190220
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Folgeprodukte halogenierter Aldehyde. XII [1]. O-Alkyl-O, O-bis-(1,2,2,2-tetrachloräthyl)- und O-Aryl-O, O-bis-(1,2,2,2-tetrachloräthyl)-phosphorsäureester (1977)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 319 (1977), S. 702-704 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Derivatives of Halogenated Aldehydes. XII. Alkyl-di(1,2,2,2-tetrachloroethyl) and Aryl-di(1,2,2,2-tetrachloroethyl) phosphates
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19773190424
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Folgeprodukte halogenierter Aldehyde IX. Die Synthese von Dialkyl-1,2,2,2-tetrachloräthyl- und Alkyl-phenyl-1,2,2,2-tetrachloräthyl-phosphaten (1977)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 319 (1977), S. 23-28 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Derivatives of Halogenated Aldehydes. IX. The Synthesis of Dialkyl-1,2,2,2-tetrachloroethyl- and Alkyl-phenyl-1,2,2,2-tetrachloroethyl PhosphatesDialkyl-1,2,2,2-tetrachloroethyl- (3a-t) and alkyl-phenyl-1,2,2,2-tetrachloroethyl phosphates 3u, v are prepared by reactions of 1,2,2,2-tetrachloroethyl phosphorodichloridate 1 with one mole of an alcohol or phenol to give alkyl(phenyl)-1,2,2,2-tetrachlorethyl phosphorochloridates 2a-k, followed by treatment of the latter with a second alcohol. The n.m.r. spectra of 2 and 3 are discussed.
    Notes: Dialkyl-1,2,2,2-tetrachloräthyl- (3a-t) und Alkyl-phenyl-1,2,2,2-tetrachloräthyl-phosphate 3u, v werden dargestellt durch Umsetzungen von 1,2,2,2-Tetrachloräthyl-dichlorphosphat 1 mit einem Mol eines Alkohols oder Phenol zu den Alkyl(Phenyl)-1,2,2,2-tetrachloräthyl-chlorphosphaten 2a-k und deren Reaktionen mit einem zweiten Alkohol. Die 1H-NMR-Spektren von 2 und 3 werden diskutiert.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19773190105
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Bromierung und Dehydrobromierung in den Seitenketten von 1,2,3-Thiadiazolen (1982)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1982 (1982), S. 683-698 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Bromination and Dehydrobromination in the Side Chains of 1,2,3-ThiadiazolesThe bromination of 1,2,3-thiadiazoles with N-bromosuccinimide (NBS) is investigated. The monobromides 3 and 4 and the dibromides 5 and 6 can be isolated. Several methods have been used for the introduction of double bonds by the elimination of HBr. Besides the elimination products 9, 11, 12, and 14 the substitution products 10, 13, 15, 16, and 17 are obtained. A lot of regio- and stereoselectivities can be observed.
    Notes: Bei den 1,2,3-Thiadiazolen 2a-h wird die Bromierung mit N-Bromsuccinimid (NBS) untersucht. Es können die Monobromide 3 und 4 sowie die Dibromide 5 und 6 isoliert werden. Zur Einführung von Doppelbindungen unter HBr-Abspaltung werden mehrere Verfahren geprüft. Neben den Eliminierungsprodukten 9, 11, 12 und 14 erhält man die Substitutionsprodukte 10, 13, 15, 16 und 17. Man beobachtet dabei eine Reihe von Regio- und Stereoselektivitäten.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198219820408
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Synthesen von Heterocyclen, CCV. Reaktionen mit cyclischen Oxalylverbindungen, XX Reaktionen von 4-Benzoyl-5-phenyl-2,3-dihydrofuran-2,3-dion mit aliphatischen Nitrilen (1977)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1977 (1977), S. 1751-1757 
    Details
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses of Heterocyclic Compounds, CCV. - Reactions of Cyclic Oxalyl Compounds, XX. - Reactions of 4-Benzoyl-5-phenyl-2,3-dihydrofuran-2,3-dione with Aliphatic NitrilesThe reaction of 4-benzoyl-5-phenyl-2,3-dihydrofuran-2,3-dione (1) with butyro-. isobutyro-, and phenylacetonitrile under thermolysis conditions leads via the dibenzoylketene-intermediate 2 to the 2-alkyl-5-benzoyl-6-phenyl-1,3-oxazin-4-ones 3, which can be converted by hydrolysis into the N-acylacrylamides 4. 2-Benzoyl-3-phenyl-5,6-dihydro-1 H-pyrano[2,3-c]isoquinoline-1,6-dione (5) is formed as a by-product in the reaction of 1 and phenylacetolnitrile. The structure of 5 is confirmed by alkylation and oxidation reactions.
    Notes: 4-Benzoyl-5-phenyl-2,3-dihydrofuran-2,3-dion (1) reagiert mit Butyro-, Isobutyro- und Phenylacetonitril unter Thermolysebedingungen über die Dibenzoylketen-Zwischenstufe 2 zu den 2-Alkyl-5-benzoyl-6-phenyl-1,3-oxazin-4-onen 3, die sich zu den N-Acylacrylsäureamiden 4 hydrolysieren lassen. Aus 1 und Phenylactonitril entsteht als Nebenprodukt 2-Benzoyl-3-phenyl-5,6-dihydro-1 H-pyrano[2,3-c]isochinolin-1,6-dion (5), dessen Struktur durch Alkylierung sowie Oxidation mit KMnO4 gesichert wurde.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.197719771022
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Zur Bindungsisomerisierung von Acetylen- und Allen-Kohlenwasserstoffen. II [1]. Kinetische Untersuchungen über die Isomerisierung von Propin und Allen an einem sauren Molekularsiebkatalysator in der Gasphase (1977)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 319 (1977), S. 655-666 
    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 Bond Isomerization of Acetylenic and Allenic Hydrocarbons. II. Kinetic Studies on the Isomerization of Propine and Allene with an Acidic Molecular Sieve Catalyst in the Gas PhaseThe gas phase isomerization of propine and allene (propadiene) was studied on a molecular sieve 13X, modified with Ni and Ca, in the temperature range of 108-173 °C with the aid of a close circulation apparatus. The bond isomerization may be considered as an example of a monomolecular, reversible, heterogeneous catalyzed reaction of the type A ⇌ B. For the studied isomerizations the rate equations of the Langmuir-Hinshelwood-type were derived by kinetic analysis of the experimentally obtained dependence of the mole fractions from the residence time. The rate and adsorption constants of the Langmuir-Hinshelwood equations were determined, their physical interpretation was possible.
    Notes: Die Gasphasen-Isomerisierung des Propins und Allens (Propadiens) wurde an einem mit Ni und Ca modifizierten Molekularsieb vom Typ 13 X im Temperaturbereich von 108 bis 173 °C in einer Zirkulationsapparatur mit geschlossenem Kreislauf kinetisch verfolgt. Für die als Prototyp einer monomolekularen, reversiblen, heterogen katalysierten Reaktion vom Typ A ⇌ B anzusehende Bindungsisomerisierung wurden vollständige Geschwindigkeitsausdrücke vom Langmuir-Hinshelwood-Typ abgeleitet und durch kinetische Analyse der experimentell bestimmten Molenbruch-Kontaktzeit-Verläufe die Geschwindigkeits- und Adsorptionsgleichgewichtskonstanten ermittelt. Sämtliche Konstanten sind physikalisch interpretierbar.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19773190416
    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...