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  • Wiley-Blackwell  (13)
  • 1990-1994
  • 1970-1974  (13)
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  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Novel Inorganic Ring Systems. XX. Tricyclic Inorganic Ring Systems with Four and Five Different ElementsThe four ring systems D, E, F and G unknown solong, could be synthesized according to Schema 1. Their structure was confirmed by mass, proton resonance, and infrared spectroscopy. The single compounds are characterized by a deep green colour and an unusually high solubility in indifferent organic solvents.
    Notes: Die vier bisher unbekannten Ringsysteme D, E, F und G konnten nach den Angaben des Schema 1 synthetisiert werden. Ihre Struktur wurde durch Massen-, NMR- und IR-Spektren sowie Röntgenstrukturanalysen sichergestellt. Die einzelnen Verbindungen zeichnen sich durch eine tiefgrüne Farbe und ungewöhnlich hohe Löslichkeit in inerten organischen Lösungsmitteln aus.
    Additional Material: 5 Tab.
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  • 2
    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.
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  • 3
    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).
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  • 4
    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 1.3-dichloro-pentamethyldisilazane and -tetramethyldisiloxane with hydrazine and 1.2-dimethylhydrazine respectively the novel inorganic ring systems (C), (D)/(D′), (E)/(E′) and (F) (see chapter 1) represented by the compounds I-IV could be constructed. So long it was not possible to decide if the compounds of the systems D/D′ and E/E′ have bicyclo[3.3.0]-octane or cyclobutyl-cyclobutane structure.
    Notes: Durch Umsetzung von 1,3-Dichlor-pentamethyldisilazan und -tetramethyldisiloxan mit Hydrazin bzw. 1,2-Dimethylhydrazin ließen sich in den Verbindungen I-IV die neuen anorganischen Ringsysteme (C), (D)/(D′), (E)/(E') und (F) (siehe Kap. 1) aufbauen. Bisher konnte keine endgültige Entscheidung getroffen werden, ob es sich bei den Systemen D/D′ und E/E′ um NSi2N2Si2N- bzw. OSi2N2Si2O-Bicyclo[3,3,0]-oktan- oder um NSi2N—NSi2N- bzw. OSi2N—NSi2O-Cyclobutyl-cyclobutan-Derivate handelt.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 385 (1971), S. 164-176 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Decachloro-N,N′-bis(silyl)-cyclodisilazane (I), Cl10Si4N2, is formed via the reaction paths of scheme 1. The total substitution of the Cl atoms was achieved by methyllithium (→ II), methanol (→ III), ethanol (→ IV) or methylamine (→ V), whereas dimethylamine only reacted to (VI), and diethylamine to (VII). The stepwise substitution of the Cl atoms was not possible, in this case only mixtures of I with mono-, di- or trisubstituted products were received which gave further dismutation reactions on attempting their isolation. (1) was easily cleaved by HCl, but only (Cl3Si)2NH did result and not, as was hoped, N(SiCl3)3.
    Notes: Dekachlor-N,N′-bis(silyl)-cyclodisilazan (I), Cl10Si4N2, bildete sich auf den Reaktionswegen des Schema 1. Die Totalsubstitution der Cl-Atome gelang mit Methyllithium [→ me10Si4N2 (II)], Methanol [→ (meO)10Si4N2 (III)], Äthanol [→ (etO)10Si4N2 (IV)] oder Methylamin [→ (meNH)10Si4N2 (V)], während mit Dimethylamin nur (me2N)9ClSi4N2 (VI), mit Diäthylamin nur (et2N)6Cl4Si4N2 (VII) entstand. Versuche zur gezielten stufenweisen Substitution der Cl-Atome ergaben weitgehend Gemische des Ausgangsprodukts mit ein-, zwei- oder dreifach substituierten Derivaten, die sich bei Aufarbeitungsversuchen einer Isolierung durch weitere Dismutationen entzogen. Die HCl-Spaltung von I führte nicht wie erhofft zu N(SiCl3)3, sondern nur zu 2 (Cl3Si)2NH.
    Additional Material: 3 Tab.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 392 (1972), S. 179-187 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Novel inorganic ring systems. XIV. Seven and ninemembered rings with silicon and nitrogen and also with oxygen atomsSynthesis of the novel sevenmembered ring systems Si4N3 and Si4N2O as well as of the ninemembered ring systems Si5N4 and Si5N2O2 was achieved by condensation of α,ω-difunctional building units in high dilution. The single compounds of the novel ring systems are confirmed in their structure by elemental analysis, molar refraction, infrared, nmr and mass spectra. A tenmembered ring system Si4N6 rearranged during its preparation into the Si4N4-cyclotetrasilazane system with two exocyclic amino groups.
    Notes: Durch Kondensation α,ω-difunktioneller Bausteine bei hoher Verdünnung gelang die Darstellung der neuen siebengliedrigen Ringsysteme Si4N3 und Si4N2O sowie der neungliedrigen Ringsysteme Si5N4 und Si5N2O2. Die einzelnen Vertreter der neuen Verbindungsklassen wurden in ihrer Struktur durch Elementaranalysen, Molrefraktionen, IR-, NMR- und Massenspektren bestätigt. Ein zehngliedriges Ringsystem Si4N6 wich dagegen während der Darstellung in das Si4N4-Cyclotetrasilazansystem mit zwei exocyclischen Aminogruppen aus.
    Additional Material: 1 Tab.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 394 (1972), S. 125-132 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Salt-like compounds [R3NH]⊕[(Cl3Si)2N]⊖ are formed on adding of pyridine, trimethyl or triethylamine to a solution of bis-(trichlorosilyl)amine in petrol ether. The bis(trichlorosilyl)amide ion shows the strongest SiN bonds so far known, with a SiN bond order of 2 and in accordance with the formula [Cl3⊖Si=⊕N=⊖SiCl3].
    Notes: Beim Zutropfen von Pyridin, Trimethyl- oder Triäthylamin in Petroläther zu Bis(trichlorsilyl)amin bilden sich die salzartigen Verbindungen [R3NH]⊕ [(Cl3Si)2N]⊖. Im Bis(trichlorsilyl)amid-ion liegen die bisher stärksten SiN-Bindungen mit einem SiN-Bindungsgrad 2, einer Formel [Cl3⊖Si=⊕N=⊖SiCl3] entsprechend vor.
    Additional Material: 2 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 406 (1974), S. 7-18 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Novel Inorganic Ring Systems. XIX. Additional Novel Cyclosilazanes and Cyclosiloxazanes Containing N—N Bonds in the Ring StructureAccording to the reaction paths of Schema 1 the compounds I-XIII have been prepared, confirmed in their constitution (Tab. 1-4) and described in their properties (Tab. 1). The seven membered ringsystem Si3N2O2 of compound X and the eight membered ring system Si4N4 (=SiNSi2NSiN2 of compound XIII have been unknown so far. The properties of the 3 isomeric Si4N4-ringsystems (Schema 2) are compared.
    Notes: Auf den Reaktionswegen des Schema 1 wurden die Verbindungen I-XIII dargestellt, in ihrer Struktur aufgeklärt (Tab. 1-4) und in ihren Eigenschaften beschrieben (Tab. 1). Das in X enthaltene siebengliedrige Ringsystem Si3N2O2 und das achtgliedrige Ringsystem Si4N4 (=SiNSi2NSiN2) der Verbindung XIII warden bisher unbekannt. Die Eigenschaften der 3 isomeren Ringsysteme Si4N4 (Schema 2) werden verglichen.
    Additional Material: 4 Tab.
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  • 9
    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.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 384 (1971), S. 115-123 
    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(methylamino)hexamethyltrisildioxane reacts in the presence of triethylamine easily with germanium tetrachloride (equ. 1) and ethyldichlorophosphine (equ.2) to give the formerly unknown inorganic eightmembered ring systems Si3GeN2O2 and Si3PN2O2. Respectively. By analogous reacting of silicon tetrachloride only open chained Cl3Si—Nme—Sime2—O—Sime2—O—Sime—NHme (IV; equ. 3) is formed. With metallated 1.5-bis(alkylamino)trisildioxanes, dischlorodiorganylsilanes do not give the expected asymmetric-, but the symmetric cyclotetrasildioxdiazanes V-VII. Dichlorophenylborane, in an analogous reaction, leads to the novel eightmembered ring system BSi3N2O2, but the exact position of the N and O atoms in the ring could not be fixed beyond any doubt. The novel sixmembered ring system BSi2Ni2O was realized in compound IX via equ. (6).
    Notes: 1,5-Bis(methylamino)hexamethyltrisildioxan setzt sich in Gegenwart von Triäthylamin glatt mit Germaniumtetrachlorid (Rk. 1) oder auch mit Äthyldichlorphosphin (Rk. 2) zu den bisher unbekannten anorganischen Achtringsystemen Si3GeN2O2 und Si3PN2O2 um. Bei analoger Reaktionsführung gibt Siliciumtetrachlorid nur offenkettiges Cl3Si—Nme—Sime2—O—Sime2—NHme (IV; Rk. 3). Metallierte 1.5-Bis(alkylamino)trisildioxane reagieren mit Diorganyldichlorsilanen überraschenderweise zu symmetrischen Cyclotetrasildioxdiazanen, V-VII, nicht zu den erwarteten asymmetrischen Achtringen. Die analoge Umsetzung mit Phenyldichlorboran führt nach Rk. (5) zu dem neuen Achtringsystem BSi3N2O2, doch läßt sich hierin die Stellung der Ringglieder noch nicht eindeutig festlegen. Ein neues Sechsringsystem BSi2N2O konnte in Verbindung IX fiber über Rk. (6) realisiert werden.
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