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  • 1990-1994  (5)
  • Organic Chemistry  (4)
  • 25.30.−c  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Phenomenological wave functions for the massA=14 system and a consistent description of beta decay observables (1991)
    Springer
    The European physical journal 341 (1991), S. 9-24 
    Details
    ISSN: 1434-601X
    Keywords: 21.60.−n ; 23.40.−s ; 25.30.−c
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A set of phenomenological wave functions has been derived to describe the14N ground state and the isospin triplet consisting of the14C ground state, the first excited state of14N at 2.313 MeV and the14O ground state. Elastic and inelastic electron scattering form factors, the magnetic moment of the14N ground state and the shape factors in theβ ± decay have been employed in a multiparameter fitting procedure to determine the amplitudes of the wave functions inL-S coupling. The inclusion of the beta decay observables in the fit has become possible for the first time since exact formulas for the shape factor in higher order do exist. The set of wave functions deduced exhibit predominately anL=0 contribution for the 0+; 1 states andL=1 and 2 contributions of nearly equal weight for the 1+; 0 state. It was observed that the inclusion of the shape factors allowed a more stringent determination of the amplitudes compared to previous attempts reported in the literature and led in the case of the 0+; 1 states to wave functions that show a small but noticeable difference within the isospin triplet. Besides the observables used for the fit, the radiative widthΓ γ (M1) of the 2.313 MeV state in14N can be described quite well with the derived wave functions, and in addition it has become possible to predict the pathological largeft − value of the14C decay and theft + value of the14O decay precisely. The wave functions are also applied to calculate the14N(γ,π +) cross section.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01281270
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  • 2
    Electronic Resource
    Electronic Resource
    Heterocyclisch substituierte Arendiazoniumsalze mit erweiterter spektraler Empfindlichkeit. II. 4-(1-Heterocycliden-2,3-diaza-prop-2-en-3-yl)-benzendia-zoniumtetrafluoroborateHerrn Prof. Schulz zum 60. Geburtstag gewidmet (1990)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 332 (1990), S. 43-54 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Heterocyclic Substituted Arenediazonium Salts with a Long-wave-length Range of Sensitivity. II. 4-(1-Heterocycliden-2,3-diaza-prop-2-en-3-yl)-arenediazonium tetrafluoroboratesThe title compounds (3) are obtained by reaction of aromatic bis-diazonium salts with substituted 2-benzylidene-1,3-dithioles and 2-benzylidene-1,3-diselenole, respectively. The maximum of the long wave-length absorption band of 3 varies from 580 nm up to 665 nm depending on the structure of the compound.The quantum yields of the photolysis of the diazonium salts 3 are low (1 · 10-4 to 7 · 10-3). The azo dyes obtained from 3 with usual azo-couplers absorb in a shorter wave-length range than the corresponding diazonium salts themselves (hypso-coupling effect).
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19903320106
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  • 3
    Electronic Resource
    Electronic Resource
    Lewis-Säure- und photochemisch induzierte Dimroth-Umlagerung von 3H,6H-2,5-Bis-(p-N,N-dimethylaminophenyl)-1,2-thiazolino[5,4-d]1,2-thiazolin-3,6-dithion (1990)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 332 (1990), S. 387-393 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Lewis-acid and Photochemically Induced Dimroth Rearrangement of 3H,6H-2,5-Bis-(p-N,N-dimethylaminophenyl) -1,2-thiazolino[5,4-d]1,2-thiazoline-3,6-dithioneThe reaction of 3H,6H-1,2-dithiolo[4,3-c]1,2-dithiole-3,6-dithione (5) with N,N-dimethyl-p-phenylendiamin gives, depending on the conditions of the reaction, 3H,6H-3-(p-N,N-dimethylaminophenyl-imino)-1,2-dithiolo[4,3-c]1,2-dithiole-6-thione (7), and 3H,6H-2,5-Bis-(p-N,N-dimethylaminophenyl) -1,2-thiazolino[5,4-d]1,2-thiazoline-3,6-dithione (3d). Catalyzed by Lewis acids the compound 3d rearranges reversibly into the isomeric 3H,6H-3,6-bis-(p-N,N-dimethylaminophenyl-imino) -1,2-dithiolo[4,3-c]1,2-dithiole (4d). The Dimroth type rearrangement of 3d into 4d occurs also on irradiation.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19903320317
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  • 4
    Electronic Resource
    Electronic Resource
    Reaction of 3H, 6H-1, 2-Dithiolo[4,3-c]1,2-dithiole-3, 6-dithione with primary aliphatic amines (1991)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 333 (1991), S. 19-24 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The reaction of 3H,6H-1,2-dithiolo[4,3-c]1,2-dithiole-3, 6-dithione (1) with primary aliphatic amines (8a,b) gives 3H,6H-3,6-bisalkylimino-1,2-dithiolo[4,3-c]1,2- dithiole (9a,b), 3H,3-N-alkylamino-5-N-alkylthiocarbamido-1, 2-dithiolium-4-thiolate (10a,b) and 3H,3-N-alkylimino-4-alkylamino-5-N-alkylthiocarbamido-1,2-dithiole (11a,b). The compounds 9-11 can be formed from one another. The compounds 10a,b react with nickel chloride to the stable complexes 14a,b. In basic medium 10 gives the salt of 3H,3N-alkylthiocarbamido-1,2-dithiole-4-thiolate 15, which reacts with methyl iodide to 3H,3N-alkylimino-5-N-alkylthiocarbamido-4-methylthio-1,2-dithiole 16.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19913330103
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  • 5
    Electronic Resource
    Electronic Resource
    About the Unusual Formation of a Vinylogue TetrathiafulvaleneOrganic Electronic Conductors and Precursors, XVI [1] (1994)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 336 (1994), S. 355-356 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19943360415
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