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  • 1
    Electronic Resource
    Electronic Resource
    ADSORPTION OF CONGO RED BY HYDROUS THORIUM OXIDE (1961)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 65 (1961), S. 1272-1273 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100825a502
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  • 2
    Electronic Resource
    Electronic Resource
    Composition and Stability of the Chelate between Uranium(VI) and Sulfodichlorohydroxydimethyl Fuchson Dicarboxylic Acid(Trisodium Salt) (1963)
    s.l. : American Chemical Society
    Inorganic chemistry 2 (1963), S. 216-219 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic50005a056
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  • 3
    Electronic Resource
    Electronic Resource
    Specific colorimetric reagents for the determination of palladium(II) (1968)
    s.l. : American Chemical Society
    Analytical chemistry 40 (1968), S. 1280-1283 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60264a021
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  • 4
    Electronic Resource
    Electronic Resource
    Existence of Cupric Hexammino Sulphate (1947)
    [s.l.] : Nature Publishing Group
    Nature 159 (1947), S. 339-339 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] WHILE the hexammino compounds of the halides, nitrates and other salts of copper are well known, nothing seems to be on record regarding the existence of cupric hexammino sulphate. In recent communications, Dey and Bhattacharya1 have described a new method for the isolation of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/159339b0
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  • 5
    Electronic Resource
    Electronic Resource
    Über die Fällung wäßrigen Oxydes aus einer Zinksulfatlösung I (1955)
    Springer
    Colloid & polymer science 141 (1955), S. 40-42 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Zur vollständigen Fällung von Zink aus dessen Sulfatlösung reicht eine weit geringere Menge Alkali aus, als es der theoretisch äquivalenten entspräche. Temperaturänderungen und Konzentrationsänderungen wirken sich im vorliegenden Falle nicht annähernd so stark aus wie bei der Fällung verschiedener anderer Metallhydroxyde (5). Die Sulfat-Assoziation an den Hydroxydniederschlag nimmt mit steigenden zur Fällung desselben verwendeten Alkalikonzentrationen ab. Bei unvollständiger Fällung läßt sich keine Aussage über adsorbierte Ionenkonzentrationen machen, sichere dagegen bei vollständiger Fällung. Die Sulfatadsorption geht mit steigender Temperatur zurück. Oberhalb 50° C nimmt sie aber erneut wieder zu, da dann wahrscheinlich Hydrolyse einsetzt. Die hier mitgeteilten Ergebnisse sind in Übereinstimmung mit unseren früheren Arbeiten. Sie sollen durch weitere Untersuchungen ergänzt werden.
    Notes: Summary From the results described in this paper, it may be concluded that the precipitation of zinc from the solution of zinc sulphate is complete with a quantity of alkali which is much below the theoretically equivalent amount. The effect of temperature and dilution is not very marked as was observed in the precipitation of several metal hydroxides studied by us (5). From the adsorption studies we find that the association of sulphate with the precipitated hydroxides decreases with the increase in the concentration of alkali employed. As long as the precipitation of zinc is not complete, no generalization is possible on account of unequal amounts of adsorbent hut when the precipitation is complete a regularity in adsorption is noted. With increase in temperature, from 30° to 50° the adsorption of sulphate decreases in every case but with further rise in temperature, hydrolysis appears to be taking place, with time, and hence the amount of sulphate associated again increases. These observations are in accordance with those made in earlier studies. This paper records some of the preliminary observations and full work is in progress to understand the character of zinc hydroxide more fully.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01511750
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  • 6
    Electronic Resource
    Electronic Resource
    Weitere Untersuchungen über Zinkoxydhydrat (1955)
    Springer
    Colloid & polymer science 141 (1955), S. 104-106 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Die Bildung löslicher Zinkate wurde durch Dialysieren von Lösungen aus Zinkhydroxyd in Natronlauge untersucht. In einem solchen System existiert ein Gleichgewicht zwischen der Natriumzinkat- und der kolloidalen Zinkhydroxydkonzentration. Die Menge und Stabilität des ersten wächst mit der Alkalikonzentration. Mit fortschreitender Dialyse verschiebt sich das Gleichgewicht. Schließlich entsteht auf Grund der Hydrolyse der Zinkat-Ionen eine kolloide Lösung.
    Notes: Summary The formation of soluble zincates has been investigated by dialysing a solution of zinc hydroxide in sodium hydroxide solution. It has been concluded that the system contains an equilibrium mixture of sodium zincate and colloidal zinc hydroxide and the proportion and stability of the former increase with the increase in the concentration of alkali. The equilibrium shifts with progressive dialysis and ultimately the system passes to a colloidal solution as a result of the hydrolysis of zincate ions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01510558
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  • 7
    Electronic Resource
    Electronic Resource
    Untersuchungen über hydratisiertes Zinnoxyd (1955)
    Springer
    Colloid & polymer science 141 (1955), S. 106-109 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Zusammenfassung Die obigen Ergebnisse zeigen klar, wie weit eine Zinntetrachloridlösung bei steigendem Alkalizusatz hydrolysiert. Nach Abb. 1 und 2 steigt die Hydrolyse mit zunehmender Alkalizugabe. Bei alternden Lösungen nimmt sie ebenfalls mit der Zeit des Alterns zu. Die gleichen Untersuchungen wurden an verschieden stark gealterten Zinnchloridlösungen durchgeführt. Abb. 3, 4 und 5 verdeutlichen, daß das Alter der Lösung die Hydrolyse zunehmend verstärkt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01510559
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  • 8
    Electronic Resource
    Electronic Resource
    Sodium-alizarin-3-sulphonate as a colloidal electrolyte (1958)
    Springer
    Colloid & polymer science 158 (1958), S. 147-148 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary During the study of the composition of metal chelates of sodium alizarin-3-sulphonate, it was realized that the colloidal nature of the reagent, especially in concentrated solutions, masks the true composition of the chelate. An investigation of the electrical conductance at various dilutions and temperatures shows that the reagent belongs to the class of colloidal electrolytes. It is recommended that for the study of the composition of chelates involving such chelating agents, extremely dilute solutions should be employed for physicochemical investigation, because under these conditions the reagent would behave as a true electrolyte.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01840020
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  • 9
    Electronic Resource
    Electronic Resource
    Biligand metal chelates of 1,10-phenanthroline and several salicyclic acid derivatives in solution (1978)
    Springer
    Transition metal chemistry 3 (1978), S. 243-246 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Mixed ligand complexes of copper(II), zinc(II), nickel(II) and cobalt(II) ions involving 1,10-phenanthroline (phen) as primary and 3,5-dinitrosalicylic acid (dnsa), 5-nitrosalicylic acid (nsa), 5-chlorosalicylic acid (csa) and 3,5-dibromosalicylic acid (dbsa) as secondary ligands in solution have been investigated potentiometrically [25°, µ = 0.1 M [NaClO4], medium 50% v: v aqueous ethanol]. The stability order of mixed ligand complexes with respect to the metal ions obeys the natural order: cobalt(II) 〈 nickel(II) 〈 copper(II) 〉 zinc(II). The stabilities of the heterometal chelates have been compared with the corresponding homometal chelates of the secondary ligands and have been interpreted in terms of metal-ligand π effects and coulombic interactions between various ligand anion species present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01393557
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  • 10
    Electronic Resource
    Electronic Resource
    Biologically important compounds as ligands: Binary and ternary complexes of 5-amino-7-hydroxy-triazolo[4,5—d]pyrimidine (“8-azaguanine”) in solution (1978)
    Springer
    Monatshefte für Chemie 109 (1978), S. 853-860 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wurden Komplexierungsgleichgewichte vom binären TypM−L [M=Cu(II), Ni(II), Co(II), Zn(II), Cd(II) und UO2(VI);L=AZN=8-Azaguanin] potentiometrisch untersucht. Die Untersuchungen wurden auf ternäre Systeme vom TypM−A−L ausgedehnt [A=2,2′-Bipyridin, 1,10-Phenanthrolin oder Nitrilotriessigsäure]. Die Messungen wurden bei 25°C bei Ionenstärken von 0,1M (NaClO4) in 50% wäßr. Ethanol durchgeführt. Die Stabilität der ternären Komplexe im Vergleich zu den entsprechenden binären wird diskutiert.
    Notes: Abstract Metal complexation equilibria in the binary complexing systems of the typeM−L [M=Cu(II), Ni(II), Co(II), Zn(II), Cd(II), and UO2(VI);L=AZN=8-azaguanine] have been examined potentiometrically. The work has further been extended to investigating the ternary complexing systems of the typeM−A−L [A=2,2′-bipyridine, 1,10-phenanthroline or nitrilotriacetic acid]. Measurements were done at 25°C and at an ionic strength of 0.1M (NaClO4) in 50% (v/v) aqueous ethanol medium. Stabilities of the ternary complexes as compared to those of the corresponding binary complexes ofAZN are also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00907306
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