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  • Chemistry  (35)
  • Adaptor Proteins, Signal Transducing  (1)
  • 2005-2009  (1)
  • 1980-1984  (35)
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 115 (1982), S. 967-972 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis, Crystal and Molecular Structure of 1,1,3,3-Bis(1′,1′,5′,5′-tetramethylpentamethylene)alleneThe symmetrically substituted allene derivative 1,1,3,3-bis(1′,1′,5′,5′-tetramethylpentamethylene)allene (4) crystallizes in the monoclinic space group P21/c with Z = 4 molecules in the unit cell. The deviation of 2.4° from the linear arrangement of the allene group is produced by different interactions with the equatorial methyl substituents.
    Notes: Das symmetrisch substituierte Allenderivat 1,1,3,3-Bis(1′,1′,5′,5′-tetramethylpentamethylen)allen (4) kristallisiert in der monoklinen Raumgruppe P21/c mit Z = 4 Molekülen in der Elementarzelle. Die Abweichung von 2.4° aus der linearen Anordnung der Allengruppierung ist durch ihre unterschiedlichen Wechselwirkungen mit den äquatorialen Methylsubstituenten bedingt.
    Additional Material: 3 Ill.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 3659-3674 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Dication Ethers and Related Compounds, 1. On Dication Chalkogenides and DichalkogenidesReaction of N,N-, N,S-, S,S-, and O,O-substituted thiones 4a-f or selones 6a-c with trifluoromethanesulfonic anhydride leads to dication disulfides 5a-f or diselenides 7a-c, resp. No dication sulfides or selenides are obtained whose formation would parallel the reactivity of the corresponding urea derivatives. This class of dications (14, 15) is, on the other hand, accessible by the reaction of dication ethers 13 with thiones 4 or selones 6. 1H and 13C NMR data of the dication dichalkogenides and chalkogenides are compared with each other.
    Notes: N,N-, N,S-, S,S- und O,O-substituierte Thione 4a-f und Selone 6a-c reagieren mit Trifluormethansulfonsäureanhydrid zu Dikation-disulfiden 5a-f bzw. -diseleniden 7a-c. Die Bildung von Dikation-sulfiden (Dikation-seleniden), welche eine Parallele zum Reaktionsverhalten der analogen Harnstoffderivate darstellen würde, wird nicht beobachtet. Diese Verbindungsklasse (14, 15) ist jedoch durch Reaktion von Dikation-ethern 13 mit Thionen 4 bzw. Selonen 6 zugänglich. 1H- und 13C-NMR-Daten der Dikation-dichalkogenide und -chalkogenide werden miteinander verglichen.
    Additional Material: 1 Tab.
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 324 (1982), S. 107-116 
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Influence of Substituents on the T1 Energy and the S1-T1 Energy Gap in ω-Phosphorus Substituted trans-StyrenesThe fluorescence and the phosphorescence of 4-substituted ω-diphenylphosphinyl trans-styrenes 1 and analogous diphenylthiophosphinyl trans-styrenes 2 at 77 K indicate together with some oxygen-induced singlet-triplet absorption spectra a bathochromic shift of the lowest singlet (S1) and the lowest triplet level (T1) relatively to the S1 and T1 level of the unsubstituted compounds 1a and 2a, respectively. Donor substituents X in 4-position give rise to a shift of S1, which is in the most cases much greater than that of T1, so that the S1-T1 energy gap decreases. P(Y)R1R2 groups (Y = O, S) in ω-position of 1 and 2 effect a small bathochromic shift of the T1 energy level only (130-900 cm-1 relatively to unsubstituted styrene). S1 is shifted 860-2080 cm-1 to lower energies, however.
    Additional Material: 2 Ill.
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  • 4
    ISSN: 0009-286X
    Keywords: Erdgastransport ; Gasreservoir ; Peng-Robinson-Gleichung ; Redlich-Kwong-Gleichung ; retrograde Kondensation ; schwerflüchtige Kohlenwasserstoffe ; Stoffdatenberechnung ; Taupunktberechnung ; thermische Zustandsgleichung ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 1 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 55 (1983), S. 646-647 
    ISSN: 0009-286X
    Keywords: Zweiphasenströmung ; Strömungsrohrreaktor ; Absorption ; Gaseintrittseffekt ; Strömungsstruktur ; Turbulenz ; Laser-Doppler-Anemometrie ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 2 Ill.
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  • 6
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Sila-Pharmaca, XIX. Sila-Pridinol and Pridinol: Preparation and Properties as well as Structures in the Solid State and in SolutionSila-pridinol (2b), a sila-analogue of the anticholinergic pridinol (2a), was prepared by two different routes. The crystal and molecular structures of 2a and 2b were determined by X-ray structural analyses. 2a forms intramolecular hydrogen bonds in the solid state, whereas centrosymmetric cyclic dimers linked through intermolecular hydrogen bonds are observed for crystalline 2b. IR- and 1H NMR spectroscopic as well as cryoscopic studies yielded information about the structures of 2a and 2b in different solvents.  -  The pharmacological and toxicological properties of 2a and 2b were compared with one another on the basis of known structure-activity relationships. The anticholinergic properties of 2b were found to be about five times as strong as those of 2a.
    Notes: Sila-Pridinol (2b), ein Sila-Analogon des Anticholinergicums Pridinol (2a), wurde auf zwei verschiedenen Wegen dargestellt. Die Kristall- und Molekülstrukturen von 2a und 2b wurden rönt-genstrukturanalytisch bestimmt. 2a bildet im festen Zustand intramolekulare Wasserstoffbrückenbindungen aus, während sich in kristallinem 2b zentrosymmetrische, durch intermolekulare H-Brückenbindungen verknüpfte cyclische Dimere finden. IR- und 1H-NMR-spektroskopische sowie kryoskopische Untersuchungen ergaben Informationen über die Strukturen von 2a und 2b in verschiedenen Lösungsmitteln.  -  Die pharmakologischen und toxikologischen Eigenschaften von 2a und 2b wurden unter dem Gesichtspunkt bekannter Struktur-Wirkungs-Beziehungen vergleichend untersucht. 2b erwies sich als ein etwa fünfmal so starkes Anticholinergicum wie 2a.
    Additional Material: 6 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1980 (1980), S. 863-866 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Reactivity of 4H-Dithieno[2,3-b: 3′,2′-e]-thiopyran DerivatenDiethyl 4-hydroxy-2-thioxo-2H-thiopyran-3,5-dicarboxylate reacts with 2a-b to give the substitution products 3a-b. These compounds cyclize to give the diethyl 3,5-dihydroxy-4-oxo-4H-dithieno[2,3-b: 3′,2′-e]thiopyran-2,6-dicarboxylates 4a-b, which react with acyl halides to give acyl- or aryl derivatives 6a-d.
    Notes: 4-Hydroxy-2-thioxo-2H-thiopyran-3,5-dicarbonsäure-diethylester2) (1) reagiert mit 2a - b zu den Substitutionsprodukten 3a-b. Diese cyclisieren zu den 3,5-Dihydroxy-4-oxo-4H-dithieno-[2,3-b: 3′,2′-e]thiopyran-2,6-dicarbonsäure-diethylestern 4a-b, welche mit Säurehalogeniden die Acyl- und Arylderivate 6a-d bilden.
    Additional Material: 3 Tab.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1980 (1980), S. 275-284 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Peptides 119.  -  Peptide Synthesis with N-Carboxy-α-amino Acid AnhydridesOn reaction of N-carboxy-α-amino acid anhydrides (NCA) with equimolar amounts of amino-acids or excess NCA in potassium borate buffer of pH 10.2 (0°C) considerable amounts of homo-oligomers and homopolymers are formed. If an excess of amino acid is used formation of the above mentioned by-products can be suppressed. The extent of homooligomerization and homopolymerization and hydrolysis occurring during the reaction of NCA under the conditions of peptide synthesis is described.
    Notes: Bei der Umsetzung von N-Carboxy-α-aminosäureanhydriden (NCA) in äquimolaren Mengen oder im überschuß mit Aminosäuren in Kaliumborat-Puffer vom pH 10.2 (0°C) wurde die Bildung beachtlicher Mengen Homooligomere und Homopolymere beobachtet. Durch überschüssige Aminokomponente konnte die Bildung dieser Nebenprodukte unterdrückt werden. Das Ausmaß der Homooligomeren- und Homopolymerenbildung sowie das der Hydrolyse während der Reaktion von NCA unter Peptidsynthesebedingungen wird beschrieben.
    Additional Material: 2 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 94 (1982), S. 716-717 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 96 (1984), S. 306-307 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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