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  • Chemistry  (23)
  • Organic Chemistry  (13)
  • 32.80.Hd  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Arylierung von Thiocarbonylverbindungen mit Diazoniumsalzen (1982)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 324 (1982), S. 669-672 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Arylation of Thiocarbonyl Compounds by Arenediazonium Salts
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19823240425
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  • 2
    Electronic Resource
    Electronic Resource
    Synthese und Oxydation von 1-(1,3-Thiazol-2-yl)-pyrazolid-3-onen (1982)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 324 (1982), S. 873-881 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis and Oxydation of 1-(1,3-Thiazol-2-yl)-pyrazolidin-3-onesThe 1-(1,3-thiazol-2-yl)-pyrazolid-3-ones 4 are synthesized by reaction of 1-thiocarbamoyl-pyrazolidin-3-one 2 with α-halogenaldehydes and α-halogenketones, respectively. The structure of 4 is proved by their 1H-n.m.r. and mass spectra. Oxydative dimerisation of 4 leads to the bisazomethinimines 10. The compounds 10 represent a new type of azomethinimines with a quinoid structure.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19823240602
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  • 3
    Electronic Resource
    Electronic Resource
    Tetrathiafulvalene. XXI. Synthese von Tetrathiafulvalenen aus 2-Alkylthio-, 2-Arylthio- und 2-Alkylseleno-1,3-dithioliumsalzen (1984)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 326 (1984), S. 479-484 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Tetrathiafulvalenes. XXI. Syntheses of Tetrathiafulvalenes from 2-Alkylthio-, 2-Arylthio- and 2-Alkylseleno-1,3-dithiolium SaltsIn the reaction of 2-alkylthio-, 2-arylthio- or 2-alkylseleno-1, 3-dithiolium salts with trivalent phosphorus compounds in acetonitril tetrathiafulvalenes 2 are formed. As an intermediate we suppose a phosphorane, which reacts with further 1,3-dithiolium salt to provide the tetrathiafulvalene. By the application of a 2-alkylthio-1,3-dithiolium salt a monomethin dye is formed in a side reaction. When the reaction is carried out in methanol, the phosphorane is trapped by the solvent and a 2H-1,3-dithiolium salt is obtained.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19843260316
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  • 4
    Electronic Resource
    Electronic Resource
    Zur Chlorierung von N-Aryl-2,4-dimethyl-buta-1,3-dien-1,4-sultamenHerrn Prof. Dr. J. Ulbricht zum 60. Geburtstag gewidmet (1984)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 326 (1984), S. 545-555 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: About Chlorination of N-Aryl-2,4-dimethyl-buta-1,3-dien-1,4-sultamesThe sultames of structure 1 are easily chlorinated by sulfurylchloride, chlorine or tertbutylhypochlorite. The structure of the mono-(2a-c,3a, d), di-(4a-d), tri- (5c, d) and pentachlorosultames (6a, b) is determined by 13C-n.m.r. spectroscopy. Contrary to the bromination the chlorination (by SO2Cl2) starts with the substitution of the sultamring (formation of mono- and di-chlorosultames) followed of the substitution of the (C-4)-CH3- group (formation of trichlorosultames). By 1,4-addition of an other molecule of chlorine to 5 the pentachlorosultames 6a, b are obtained. Already by recrystalisation of 6a, b in an alcohol the chlorine in 4-position is exchanged by the corresponding alkoxy group (CH3O, C2H5O, n-C3H7O) and the compounds 7-9 are formed.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19843260404
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  • 5
    Electronic Resource
    Electronic Resource
    Organische Elektronenleiter und Vorstufen. V.IV. Mitt.: RICHTER, A. M.; FANGHÄNEL E.: Sulfur Lett. 3 (1985) 25. Synthese von Poly(organylthio-acetylenen) (1987)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 329 (1987), S. 811-816 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Organic Electron Conductors and Precursors. V. Synthesis of Poly (organylthio-acetylenes)Poly(bis-organylthio-acetylenes) 2 and poly(mono-organylthio-acetylenes) 3 have been synthesized by complex catalyzed polymerization of the corresponding acetylenes (4 resp. 5). Yields and properties of the polymers 2, 3 depend on reaction conditions, the catalyst and the nature of the acetylenes. Relations between these influence factors are discussed.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19873290509
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  • 6
    Electronic Resource
    Electronic Resource
    Iodierung von N-Aryl-2,4-dimethyl-buta-1,3-dien-1,4-sultamen (1985)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 327 (1985), S. 428-432 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Iodation of N-Aryl-2,4-dimethyl-buta-1,3-dien-1,4-sultamesBy the iodation of N-aryl-2,4-dimethyl-buta-1,3-dien-1,4-sultames 1 with I2/HgO in EtOH/AcOH the 1,2-thiazine ring is substituted. The monosubstitution occurs on the 1-position (1a, d) and the disubstitution on the 1,3-position (3a). By iodine monochloride in CHCl3 the sultames 1a-d were substituted in the (C-2)-CH3 group (4a-d), in contrast also to the results of chlorination and bromination of 1. The structure of the products 2, 3, 4 was proved by 13C-n.m.r. spectroscopic data.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19853270309
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  • 7
    Electronic Resource
    Electronic Resource
    Über die Thiocyanierung von AcetylendicarbonsäuredialkylesternI. Mitteilung der Serie „Organische Elektronenleiter und Vorstufen“ (1983)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 325 (1983), S. 153-156 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: About the Thiocyanation of Dialkyl Acetylendicarboxylates
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19833250119
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  • 8
    Electronic Resource
    Electronic Resource
    A method to determineL-subshell ionization cross sections for medium and heavy elements (1986)
    Springer
    The European physical journal 3 (1986), S. 379-389 
    Details
    ISSN: 1434-6079
    Keywords: 32.30.Rj ; 32.80.Hd ; 34.50.Fa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have developed a method to determineL-subshell ionization cross sections and report here on the first measurements of electron inducedL-subshell cross sections for target elements (29≦Z≦79) at electron bombarding energies between 50≦E 0≦200 keV. The method involves the detection of characteristic X rays by means of a high resolution flat crystal spectrometer of known reflectivity and is based on the correlation of measured X ray intensities, Auger- and Coster-Kronig yields and radiative transition probabilities with theL-subshell cross section.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01437196
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  • 9
    Electronic Resource
    Electronic Resource
    Measurements ofL-subshell fluorescence yields for light and medium heavy elements (28≤Z≤47) (1988)
    Springer
    The European physical journal 7 (1988), S. 301-307 
    Details
    ISSN: 1434-6079
    Keywords: 32.30.Rj ; 32.80.Hd ; 34.80.Dp
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report on the first determination ofL-subshell fluorescence yields, ωLi, for various elements with 28≤Z≤47. The method applied is based on the subshell ionization by relativistic electron impact with an electron energy ofE 0=50 keV and the detection of characteristic X rays by means of a high resolution crystal spectrometer calibrated absolutely with respect to its transmission and reflectivity. The number of initialL vacancies and its subshell distribution as well as the normalized X-ray transition probabilities, the Coster-Kronig yields and theK-shell Auger transition rates are taken from theory. The results obtained for ωLi yield values that are for all three subshells in agreement with the predictions of a widely used semi-empirical formula and for ω L2 and ω L3 also with theoretical calculations. The values of ω L1, however, exceed the theory systematically.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01439799
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  • 10
    Electronic Resource
    Electronic Resource
    Synthese von 2-Heterocyclidenamino-1,3-diazatrimethincyaninen (1979)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 321 (1979), S. 827-834 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis of 2-Heterocyclidenamino-1, 3-diaza-trimethincyaninesThe synthesis of 2-[3-methyl-benzthiazol-(1, 3)-inylidene-(2)-amino]- and of substituted 2-[1, 3-dithiolyliden-(2)-amino]-1, 3-diaza-trimethincyanines is described. The heterocyclic imines 1 react with phosgene or thiophosgene to the corresponding ureas 2 and thiureas 3, respectively. Alkylation of 3 to the 2-alkylmercapto-1, 3-diaza-trimethincyanines 4 and subsequent condensation with imine 1 yields the dyes 5. The chemical and spectroscopical data of cyanines 5 are described.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19793210514
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