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  • 2000-2004  (92)
  • 1965-1969  (21)
  • 1
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 79 (2001), S. 1807-1809 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We perform high resolution x-ray diffraction on GaMnAs mixed crystals as well as on GaMnAs/GaAs and GaAs/MnAs superlattices for samples grown by low-temperature molecular-beam epitaxy under different growth conditions. Although all samples are of high crystalline quality and show narrow rocking curve widths and pronounced finite thickness fringes, the lattice constant variation with increasing manganese concentration depends strongly on the growth conditions: For samples grown at substrate temperatures of 220 and 270 °C, the extrapolated relaxed lattice constant of Zincblende MnAs is 0.590 nm and 0.598 nm, respectively. This is in contrast to low-temperature GaAs, for which the lattice constant decreases with increasing substrate temperature. © 2001 American Institute of Physics.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 343 (1966), S. 101-108 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The IR and RAMAN spectra of (CH3)2(CH2X)SiH [X = Cl, Br, J], (CH3)2(CHX2)SiH [X = Cl] and (CH3)(CH2X)2SiH [X = Cl] are reported, and the frequencies assigned. A simple relation exists between the frequence of the SiH stretching vibration and the rate constant of the bromination of the SiH bond.
    Notes: Für die Verbindungen (CH3)2(CH2X)SiH [X = Cl, Br, J], (CH3)2(CHX2)SiH [X = Cl] und (CH3)(CH2X)2SiH [X = Cl] werden die IR- und RAMAN-Spektren mitgeteilt und die Frequenzen zugeordnet. Es besteht eine einfache Beziehung zwischen der SiH-Valenzfrequenz und der Geschwindigkeitskonstante für die Bromierung der SiH-Bindung.
    Additional Material: 1 Ill.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 351 (1967), S. 37-41 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The alkaline solvolysis of some meta-substituted aryl silanes in ethanol/water was investigated by kinetic methods. The specific rate constants demonstrate a great influence of substituents which can be interpreted by means of TAFTS σº constants.
    Notes: Die alkalische Solvolyse einiger meta-substituierter Aryl-silane in Äthanol/Wasser wurde kinetisch untersucht. Die spezifischen Geschwindigkeitskonstanten zeigen einen starken Substituenteneinfluß, der mit Hilfe der TAFTschen σº-Werte gedeutet werden kann.
    Additional Material: 1 Ill.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 352 (1967), S. 36-44 
    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 SiCl4, CH3SiCl3 and C6H5SiCl3 with oxalie acid in solution of some ethers ((C2H5)2O, C4H8O2, C4H8O) substances of the compositions listed in “Inhaltsübersicht” are prepared.The interrelations between these different types of structure and their dependence on the nature of the participating ether are investigated.
    Notes: Durch Umsetzung von SiCl4, CH3SiCl3 und C6H5SiCl3 mit Oxalsäure in verschiedenen äthern ((C2H5)2O, C4H8O2, C4H8O) werden Produkte folgender Zusammensetzung dargestellt: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c} {[{\rm Si}({\rm C}_2 {\rm O}_4 {\rm H})_2 ({\rm C}_2 {\rm O}_4) \cdot 2\,\mathop {\rm A}\limits^{..}]_{\rm n}} \hfill & {(\mathop {\rm A}\limits^{..} = \mathop {\rm A}\limits^{..}\rm ther)} \hfill \\ {[{\rm RSi}({\rm C}_2 {\rm O}_4 {\rm H})({\rm C}_2 {\rm O}_4) \cdot \mathop {\rm A}\limits^{..}]_{\rm n}} \hfill & {} \hfill \\ {[{\rm Si}({\rm C}_2 {\rm O}_4)_2 \cdot 2\,\mathop {\rm A}\limits^{..}]_{\rm n}.} \hfill & {} \hfill \\\end{array} $$\end{document}Die Beziehungen der unterschiedlichen Strukturtypen und ihre Abhängigkeit von der Art des beteiligten äthers werden untersucht.
    Additional Material: 3 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 362 (1968), S. 80-86 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: In the reaction of SiCl4 with water or salt hydrates in diethyl ether an ether cleavage goes on parallel to the hydrolysis. Probably ether cleavage can be discussed as the reversal of the proton-catalysed equilibrium of ether formation from alcohol. In addition to various chlorosiloxanes, ethoxytrichlorosilane and higher-boiling ethoxychlorosiloxanes were obtained. Reports on the formation of trichlorosilanol and pentachlorodisiloxanol by these reactions could not be confirmed.
    Notes: Bei der Hydrolyse von SiCl4 in Diäthyläther mit Wasser oder Salzhydraten tritt Ätherspaltung auf, die wahrscheinlich im Sinne einer Umkehrung des protonenkatalysierten Gleichgewichts der Ätherbildung aus Alkohol gedeutet werden kann. Neben den verschiedenen Chlorsiloxanen ließen sich in den Hydrolysaten Äthoxytrichlorsilan und nicht näher definierte höhersiedende Äthoxychlorsiloxane nachweisen. Mitteilungen über die Bildung von Trichlorsilanol und Pentachlordisiloxanol bei diesen Reaktionen konnten nicht bestätigt werden.
    Additional Material: 2 Tab.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 352 (1967), S. 45-52 
    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 triorgano-chloro-silanes, (X—C6H4)3SiCl (X = H, CH3, F, Cl, Br), with oxalic acid we succeeded in preparing the bis(triorganosilyl)-oxalates (X—C6H4)3Si—C2O4—Si(C6H4—X)3 with X = H, CH3, Br. Their thermal stabilities were investigated and correlated to the effects of substituents.
    Notes: Durch Umsetzung von Triorgano-chlor-silanen (X—C6H4)3SiCl (X = H, CH3, F, Cl, Br) mit Oxalsäure gelang es, folgende Bis(triorgano-silyl)-oxalate (X—C6H4)3Si—C2O4—Si(C6H4—X)3 (X = H, CH3, Br) darzustellen. Ihre thermische Stabilität wurde untersucht und in Beziehung zu den Substituenten-Einflüssen gebracht.
    Additional Material: 1 Ill.
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  • 7
    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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  • 8
    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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  • 9
    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.
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  • 10
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: By reactions of SiCl4, RSiCl3, RSiCl2(OCOCH3), R2SiCl2 and R3SiCl, [R—CH3 and C2H5], with C6H5CO—CH2—CO—OC2H5 the substances listed in ‘Inhaltsübersicht’ have been prepared and investigated by means of UV and IR spectroscopy concerning the problem of chelate complexes with hexacovalent Si atoms.
    Notes: Durch Umsetzungen von SiCl4, RSiCl3, RSiCl2(OCOCH3), R2SiCl2 und R3SiCl[R = CH3, C2H5] mit Benzoylessigsäureäthylester wurden Produkte folgender Zusammensetzung dargestellt: Die dargestellten Verbindungen wurden mittels UV- und IR-Absorptionsspektren daraufhin untersucht, ob Chelatkomplexe mit hexakovalentem Silicium vorliegen.
    Additional Material: 2 Tab.
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