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  • 1
    Electronic Resource
    Electronic Resource
    Cleavage of 2-(1,2,3,4-tetrahydroisoquinolin-1-yl)-2-phenyl-1,3-dithianes with HgO/BF3 (1997)
    Springer
    Monatshefte für Chemie 128 (1997), S. 1033-1049 
    Details
    ISSN: 1434-4475
    Keywords: 2-(1,2,3,4-Tetrahydroisoquinolin-1-yl)-2-phenyl-1,3-dithianes ; 2-(α-Dialkylaminobenzyl)-2-phenyl-1,3-dithianes ; Cleavage with HgO/BF3 ; N-Alkyl-3,4-dihydroisoquinolinium salts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Titelverbindungen (5) wurden durch Addition des 2-Phenyl-1,3-dithian-Anions (2-Lithio-10) an entsprechend substituierte N-Alkyl-3,4-dihydroisochinolinium-Salze (7a–7g) hergestellt. Die Spaltung der Dithianderivate5 mit HgO/BF3 führt zu S-Benzoyl-1,3-propandithiol (4a), seinem Disulfid4c, Benzaldehyd und Hg(I)-Ionen. Im Gegensatz zu den Titelverbindungen liefern 2-(α-Dialkylaminobenzyl)-2-phenyl-1,3-dithiane (6) unter diesen Bedingungen Benzil.
    Notes: Summary The title compounds (5) were prepared by addition of 2-phenyl-1,3-dithiane anion (2-lithiated10) to adequately substituted N-alkyl-3,4-dihydroisoquinolinium salts (7a–7g). Cleavage of compounds5 with HgO/BF3 affords S-benzoyl-1,3-propanedithiol (4a) and the corresponding disulfide4c, benzaldehyde, and Hg(I) ions. In contrast to the title compounds, 2-(α-dialkylaminobenzyl)-2-phenyl-1,3-dithianes (6) yield benzil under these conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00806969
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  • 2
    Electronic Resource
    Electronic Resource
    The flux of interstellar dust observed by Ulysses and Galileo (1995)
    Springer
    Space science reviews 72 (1995), S. 471-476 
    Details
    ISSN: 1572-9672
    Keywords: Interstellar dust ; Ulysses dust measurements ; Galileo dust measurements
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Interstellar dust detected by the dust sensor onboard Ulysses was first identified after the Jupiter flyby when the spacecraft's trajectory changed dramatically (Grün et al., 1994). Here we report on two years of Ulysses post-Jupiter data covering the range of ecliptic latitudes from 0° to −54° and distances from 5.4 to 3.2 AU. We find that, over this time period, the flux of interstellar dust particles with a mean mass of 3·10−13 g stays nearly constant at about 1·10−4, m−2 s−1 (π sr)−1, with both ecliptic latitude and heliocentric distance. Also presented are 20 months of measurements from the identical dust sensor onboard the Galileo spacecraft which moved along an in-ecliptic orbit from 1.0 to 4.2 AU. From the impact direction and speeds of the measured dust particles we conclude that Galileo almost certainly sensed interstellar dust outside 2.8 AU; interstellar particles may also account for part of the flux seen between 1 and 2.8 AU.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00768822
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    Paper (German National Licenses)
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