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  • 1960-1964  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 311 (1961), S. 53-61 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The hydrolysis of di(t-butoxy)-dichloro-silane, (t-C4H9O)2SiCl2, is characterized by a strong steric hindrance and enclosure of the reactive groups by the large (t-butoxy)-groups. The hydrolysis products are hydrophobic and relatively inert, especially the (t-butoxy)-silanediols. More reactive are the (t-butoxy)-chloro-siloxanols and thus they are the most important carriers of the hydrolysis reaction. A chloro-siloxanol could be prepared for the first time.By steric reasons, the thermal condensation yields a six-membered ring, [(t-C4H9O)2SiO]3, though otherwise tetracyclosiloxanes are preferably formed.
    Notes: Das Hydrolyseverhalten des Di(t-butoxy)-dichlor-silans [t-C4H9O]2SiCl2 ist gekennzeichnet durch starke sterische Hinderung und Umhüllung der reaktiven Gruppen durch die raumbeanspruchenden (t-Butoxy)-Gruppen. Die Hydrolyseprodukte sind hydrophob und relativ reaktionsträge. Besonders die (t-Butoxy)-siloxandiole neigen wenig zu weiterer Kondensation. Reaktionsfähiger und damit die wesentlichen Träger der Hydrolysereaktion sind die (t-Butoxy)-chlor-siloxanole, von denen erstmalig ein Vertreter dargestellt werden konnte.Die Hitzekondensation führt aus sterischen Gründen zur Bildung des 6gliedrigen Ringes [(t-C4H9O)2SiO]3, während sonst Tetracyclosiloxan-Ringe bevorzugt werden.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 314 (1962), S. 104-112 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: By reaction of sulphates with boric acid and sulphur trioxide bis(sulphato)borates: MeI[B(SO4)2]2, MeII[B2O(SO4)2]2 and tris(sulphato)diborates: MeII[B2O(SO4)3], could be prepared. These substances are very hygroscopic and sensitive to hydrolysis. Probably they are ionic compounds with high-polymeric anions.
    Notes: Durch Umsetzung von Sulfaten mit Borsäure und Schwefeltrioxid wurden Bis-(sulfato)borate: MeI[B(SO4)2]2 und Tris(sulfato)diborate: MeII[B2O(SO4)3] gewonnen. Diese Substanzen sind stark hygroskopisch und äußerst hydrolyseempfindlich. Vermutlich handelt es sich um Salze mit hochpolymerem Anion.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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