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  • 1
    ISSN: 0948-5023
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis of Bis(1-phenoxy-propen-2-yl)-sulfanes derived from Bis(1-chloro-3-phenoxy-prop-2-yl)-sulfanes with Potassium-tert.-butoxid - Determination of the E,E-ConfigurationBis(1-chloro-3-phenoxy-prop-2-yl)-sulfanes (1), anti-MARKOVNIKOV 2:1-adducts of allylphenyl ethers with sulfur dichloride at low temperature are transformed in the presence of potassium-tert.-butoxid by dehydrohalogenation / prototropic rearrangement to phenoxyvinyl sulfanes, the E,E-bis(1-phenoxy-propen-2-yl)-sulfanes 3. Sulfanes 3 are of special interest as a model for unsaturated macrocycles B derivated from dithiacrown ethers A. The configuration was assigned using 1H-n.m.r.- and 13C-n.m.r.-spectroscopy. The molecular structure was determinded by X-ray diffraction techniques. Rearrangement of sulfur-substituted allyl ethers 2 to the propenyl isomers 3a proceeds in a stereospecific manner as for common allyl ethers described in the literature.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 0044-2313
    Keywords: Bis(phenoxyalkyl)sulfane podands ; silver(I) and mercury(II) complexes ; liquid-liquid extraction ; molecular modeling ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Complex Formation of Novel Bis(phenoxyalkyl)sulfane Podands with AgI and HgIINovel bis(phenoxyalkyl)sulfane podands were synthesized and characterized in view of their complexing properties toward AgI and HgII by liquid-liquid extraction investigations using the two-phase system metal salt(AgNO3, HgCl2)-picric acid-H2O/podand-chloroform. A pronounced structure influence on the extraction properties has been observed in case of AgI, whereas generally the complex formation tendency toward HgII is limited. Bis[(5-hydroxy-3-oxapentyloxy)-3-phenoxy-prop-2-yl]sulfane 4c gives the highest extractabilities for AgI. Molecular modeling of the podands and their AgI and HgII complexes shows significant differences of the complex structures and indicates therewith the reasons of the different complexing properties.
    Notes: Neue Podanden vom Bis(phenoxyalkyl)sulfan-Typ wurden synthetisiert und hinsichtlich ihrer Komplexbildungseigenschaften gegenüber AgI und HgII durch Flüssig-Flüssig-Extraktionsuntersuchungen im Zweiphasensystem Metallsalz(AgNO3, HgCl2)-Pikrinsäure-H2O/Podand-Chloroform charakterisiert. Für AgI wurde dabei ein ausgeprägter Struktureinfluß auf die Extraktionseigenschaften beobachtet, während für HgII die Fähigkeit zur Komplexbildung nur schwach ausgebildet int. Bei AgI konnten die höchsten Extraktionsausbeuten mit dem Bis[(5-hydroxy-3-oxa-pentyloxy)-3-phenoxy-prop-2-yl]sulfan 4c erzielt werden. Molecular Modeling-Rechnungen an den Podanden sowie ihren AgI- und HgII-Komplexen zeigen signifikante Unterschiede in den Komplexstrukturen und weisen damit auf Ursachen der Differenzierten Komplexbildungseigenschaften hin.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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