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  • Articles  (163)
  • 2000-2004  (92)
  • 1970-1974  (21)
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  • 1960-1964  (29)
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  • Articles  (163)
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  • 11
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 306 (1960), S. 180-190 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: By means of several trialkyl and differently substituted triphenyl silanes of the general formula R3SiH, systematic investigations on the hydrolysis velocity and its dependence from R have been undertaken. The rate constants show an evident and partly great gradation regarding the different model substances. From this, deductions are made about the character of the Si - H-bond and the reaction mechanism of solvolysis.
    Notes: An Hand einer Reihe von Trialkyl- und verschieden substituierten Triphenylsilanen der allgemeinen Formel R3SiH wurden systematische Untersuchungen über die Hydrolysegeschwindigkeit und deren Abhängigkeit vom Organorest R angestellt. Die Geschwindigkeitskonstanten zeigen eine deutliche und zum Teil sehr starke Abstufung im Verhalten der verschiedenen Modellsubstanzen. Hieraus werden Schlußfolgerungen über den Bindungscharakter der Si - H-Bindung und über den Reaktionsmechanismus der Solvolyse gezogen.
    Additional Material: 6 Ill.
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  • 12
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 307 (1960), S. 97-104 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The oxidation of polysilane(I) is analytically investigated under different conditions. From the results conclusions are made to the structure of polysilane(I) and the mechanism of its oxidation.
    Notes: Der Oxydationsverlauf des Polysilan(I) wird unter verschiedenen Bedingungen analytisch untersucht. Aus den Ergebnissen werden Rückschlüsse auf die Struktur des Polysilan(I) und auf den Mechanismus der Oxydation gezogen.
    Additional Material: 5 Ill.
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  • 13
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 312 (1961), S. 322-331 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: By reaction in a bomb tube several addition compounds of various halogenosilanes with urea, thiourea, N-methyl-urea N, N-dimethyl-urea and N-phenyl-urea could be prepared. From IR-spectra deductions about the linkage of these compounds were made.
    Notes: Durch Reaktion im Einschlußrohr konnten eine Reihe von Additionsverbindungen verschiedener Halogen-silane mit Harnstoff, Thioharnstoff, N-Methyl-harnstoff, N, N-Dimethylharnstoff und N-Phenyl-harnstoff dargestellt werden. Aus IR-Spektren wurden Schlußfolgerungen über den Bindungszustand dieser Addukte gezogen.
    Additional Material: 3 Ill.
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  • 14
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 313 (1961), S. 107-116 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The GRIGNARD reaction between silicon halides and alkyl-Mg-halides with steric hindering alkyl groups does not run in the usual manner. Thus from SiBr4 and secondary or tertiary butyl—MgBr only the corresponding butyl-tribromosilanes (C4H9)SiBr3 could be prepared in low yields. To a great extent, there are side reactions which produce silanes with Si—H-bonds by developing butene (C4H8) and high molecular polysilanes with, Si—Si-bonds by cleaving off octane (C8H18).
    Notes: Die Grignard-Reaktion zwischen Silicium-halogeniden und Alkyl-Mg-halogeniden mit sterisch hindernden Alkylgruppen verläuft anormal. So konnten aus SiBr4 und sekundärem oder tertiärem Butyl—MgBr nur die entsprechenden Butyl-tribrom-silane (C4H9)SiBr3 in geringen Ausbeuten gewonnen werden. Es finden in großem Umfange Nebenreaktionen statt, die unter Abspaltung von Buten(C4H8) zu Silanen mit Si—H-Bindungen, sowie unter Entwicklung von Octan (C8H18) zu hochmolekularen Polysilanen mit Si—Si-Bindungen führen.
    Additional Material: 1 Ill.
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  • 15
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 325 (1963), S. 169-174 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Specific rate constants of the alkaline solvolysis of dimethyl-alkyl silanes in ethanol water are determined and compared with former results about trialkyl silanes. The alkyl group influences the reaction velocity by inductive and steric effects.
    Notes: Es werden die spezifischen Geschwindigkeitskonstanten der alkalischen Solvolyse von Dimethyl-alkyl-silanen in Äthanol/Wasser gemessen und mit früheren Ergebnissen an Trialkyl-silanen verglichen. Die Alkyl-Gruppe beeinflußt die Reaktionsgeschwindigkeit vermittels induktiver und sterischer Effekte.
    Additional Material: 2 Ill.
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  • 16
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 331 (1964), S. 59-62 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The acid-catalysed solvolysis of (CH3)2(CH2X)SiH [X = Cl, Br, J], (CH3)2(CHX2)SiH [X = Cl] und (CH3)(CH2X)SiH [X = Cl] was determined in ethanol/water and the influence of substituents was compared by means of TAFTs constants σ*.
    Notes: Die säurekatalysierte Solvolyse von (CH3)2(CH2X)SiH [X = Cl, Br, J], (CH3)2(CHX2)SiH [X = Cl] und (CH3)(CH2X)SiH [X = Cl] wurde in Äthanol/Wasser gemessen und der Substituenteneinfluß mit den TAFT-Konstanten σ* verglichen.
    Additional Material: 2 Ill.
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  • 17
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 358 (1968), S. 210-218 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Tetraalkyl-disilanes and tetraaryl-disilanes listed in “Inhaltsübersicht” are solvolysed in alkaline ethanol/water solutions. Solvolysis reactions of Si—H- and Si—Si bond proceed simultaneously and cannot be separated. The influence of organo-groups on the rates of solvolysis is determined.
    Notes: Tetraalkyl-disilane R2SiH—SiHR2 [R = C2H5-, i-;C3H7-, C6H5—CH2-] und Tetraaryl-disilane (p-X—C6H4)2SiH—SiH(C6H4—X-p)2 [X = H-, F-, Cl-, CH3-, CH3O-] werden in Äthanol/Wasser alkalisch solvolysiert. Si—H- und SiSi-Solvolyse verlaufen simultan und sind analytisch nicht zu trennen. Der Einfluß der Organogruppen auf die Solvolyse-Geschwindigkeit wird gemessen.
    Additional Material: 4 Ill.
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  • 18
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 358 (1968), S. 219-225 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Alkoxysilanes listed in „Inhaltsübersicht“ were solvolysed in alkaline ethanol/water solutions. The rates are discussed by means of substituent effects.
    Notes: Substanzen der Formel (C2H5)x(RO)3-xSiH [R = CH3-, C2H5-, n-C3H7-, s-C3H7-, n-C4H9-, i-C4H9-, s-C4H9-, t-C4H9-] [x = 0, 1, 2] wurden der alkalischen Solvolyse in Äthanol/Wasser unterworfen. Die Reaktionsgeschwindigkeiten werden an Hand von Substituenten-Effekten diskutiert.
    Additional Material: 2 Ill.
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  • 19
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 362 (1968), S. 71-79 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The reduction of SiBr4 with Mg was investigated regarding its yields in various solvent mixtures and compared with the solubility of MgBr2 in the corresponding solvents. The results - confirmed by IR spectra - show that the effect of solvent isn't based on weakening of the Si—Br bond but on dissolving the formed MgBr2.
    Notes: Die Reduktion von SiBr4 mit Magnesium wurde in verschiedenen Lösergemischen bezüglich ihrer Ausbeute untersucht und mit der Löslichkeit von MgBr2 in entsprechenden Medien verglichen. Die Ergebnisse - unterstützt durch IR-Spektren - lassen erkennen, daß die Wirkung des Solvens nicht auf der Lockerung der Si—Br-Bindung, sondern auf der Lösung des MgBr2 beruht.
    Additional Material: 3 Ill.
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  • 20
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 380 (1971), S. 283-292 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The relative acidity of substituted triphenyl silanols [X - C6H4-]3Si -OH is measured by means of potentiometric titration. The substituent effect is well defined by σ0-constants(3).
    Notes: Durch potentiometrische Titration in nichtwäßrigen Lösungen wird die relative Acidität von substituierten Triphenyl-silanolen [X - C6H4 -]3Si - OH gemessen. Der Substituenteneinfluß kann durch die σ0-Konstante3 gut wiedergegeben werden.
    Additional Material: 3 Ill.
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