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  • 1970-1974  (20)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 104 (1973), S. 1453-1456 
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The title reaction (compare equ. 1) leads with yields of about 40% to the so far unknown compounds I to VI with various substituents on the N atoms in positions 2/4- and in 6. Some physical data are recorded in Table 1.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 104 (1973), S. 1457-1463 
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The 1-chloro-3-(di)alkylamino-disilazanes1–18 were prepared according to equ. (2), characterized in their properties (Tab. 1) and confirmed in their structure (Tab. 2, 3). They could be transformed easily into disiltriazanes (equ. 3), but not be condensed into cyclotri- or-tetrasilazanes.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 104 (1973), S. 1444-1452 
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Compounds I-X of the sixmembered ring system PSi2N2O with phosphorus in different oxidation and bond numbers, collected in Schema 1, have been prepared for the first time and confirmed in their structure by elemental analysis as well as by infrared and1H- and31P-spectroscopy.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 104 (1973), S. 1465-1472 
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract At 0° dimethyldichlorosilane reacts with cooled gaseous ammonia in strictly stoichiometrical proportions (2∶3) according to the steps1→2→3 only (scheme 1) affording tetramethyldichlorodisilazane in high yield. The analogous reaction with gaseous methylamine affords pentamethyldichlorodisilazane via the steps1→4→5 (scheme 2). All earlier preparations of the two compounds have been much more complex. Ethylamine, in contrast, gives only dimethylchloro-ethylaminosilane. At room temperature its condensation and ethylaminolysis reactions are comparably fast, resulting in an inseparable mixture of 1.3-dichloro- and 1-chloro-3-ethylamino-2-ethyl-1.1.3.3-tetramethyldisilazane.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 105 (1974), S. 209-212 
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract For the first time, preparation of cyclotrisilazanes with different substituents in positions N, N′ and N″ has been achieved, via equations1–3. Analytical and physical data of the new compounds are given in tables 1 and 2.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 105 (1974), S. 1233-1239 
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The title compound1 b, formed by equation (1), reacts with different amines and metallated amines via equations (2), (3) and (4) to give the compounds2–7, partially with the formerly unknown SiN-skeletons (NSi)3NSi2 and (NSi)3N(SiN)3.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 105 (1974), S. 1240-1248 
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Metallation of the title compound via equ. (1) leads to the lithium and sodium derivatives1 and2 respectively.2 can be reacted with chlorosilanes forming3–5. Amination of4 gives6–8. The formation of7 via equ. (5) is discussed. Attempts to synthesize compoundsG andE failed.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 375 (1970), S. 157-165 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Lithium bis(trichlorosilyl)amide decomposes in the presence of silicon tetrachloride, tetrabromide, iodotrichloride or germanium tetrachloride, giving only decachloro-N,N′-bis(silyl)-cyclodi(silaz)ane. With iodosilane it reacts to bis(trichlorosilyl)-silyl-amine. With silicon tetrafluoride the product of reaction is bis(trichlorosilyl)-trifluorosilyl-amine. The latter compound rearranges already during its formation to give a nonseparable mixture with trichlorosilyl-dichlorosilyl-chlorodifluorosilyl-amine and tris(dichlorofluorosilyl)amine.
    Notes: Lithium-bis(trichlorsilyl)amid reagiert in Gegenwart von Siliciumtetrachlorid, -tetrabromid, -jodidtrichlorid oder Germaniumtetrachlorid nur unter Selbstzerfall zu Dekachlor-N,N′-bis(silyl)-cyclo-di(silaz)an, dagegen mit Jodsilan zu Bis-(trichlorsilyl)-silyl-amin und mit Siliciumtetrafluorid zu Bis(trichlorsilyl)-trifluorsilyl-amin. Dieses dismutiert jedoch noch während der Bildung teilweise zu einem nicht trennbaren Gemisch mit Trichlorsilyl-dichlorfluorsilyl-chlordifluorsilyl-amin und Tris(dichlorfluorsilyl)amin.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 381 (1971), S. 168-175 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Decamethylcyclotetrasilazane (I) was prepared starting with 1,3-dichloropentamethyldisilazane (II), 1.3-dichlorotetramethyldisilazane (III) and 1,3-bis-(methylamino)tetramethyldisilazane (IV). respectively, according to scheme 1, equ. (1), (2) and (3) in the text. (I) does not form, as given in the literature (equ. 4)5, by thermal transformation of bis(methylaminodimethylsilyl)-tetramethylcyclodisilazane (V); in this case exclusively - in equ. (2) and (3) only in side steps - the reaction products are a mixture of N-methylcyclotrisilazanes (scheme 2, VI-IX).
    Notes: Dekamethylcyclotetrasilazan (I) läßt sich aus 1,3-Dichlorpentamethyldisilazan (II), 1,3-Dichlortetramethyldisilazan (III) wie auch aus 1,3-Bis(methylamino)-tetramethyldisilazan (IV) gemäß Schema 1, Rkk. (1) bis (3), nicht jedoch durch die in der Literatur5 beschriebene thermische Umlagerung von Bis(methylaminodimethylsilyl)-tetramethylcyclodisilazan (V) (vgl. Rk. 4) darstellen. Hierbei entsteht ausschließlich, - in den Rkk. (2) und (3) nur auf Nebenwegen -, ein Gemisch von N-Methylcyclotrisilazanen (Schema 2, VI-IX).
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 383 (1971), S. 249-254 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1,5-Bis(alkylamino)octamethyltrisildiazanes react after metallation with element dichlorides according to reaction 3a and 3b respectivcly by forming ring compounds. In this way 1,2,8-organylsubstituted permethylated cyclotetrasilazanes (I, II) and inorganic eightmembered ringsystems BSi3N4. PSi3N4 and GeSi3N4, were prepared for the first time.
    Notes: 1,5-Bis(alkylamino)oktamethyltrisildiazane reagieren nach Metallierung mit Elementdichloriden über Rk. 3a oder 3 b unter Ringschluß. Neben 1,2,8-organylsubstituierten, permethylierten Cyclotetrasilazancn (I, II) ließen sich so erstmalig anorganische Achtringsysteme BSi3N4. PSi3N4 und GeSi3N4 darstellen.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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