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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 2735-2737 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Silicenium-Ylide Reactions of Lithio-aminofluorosilanesLithio-aminofluorosilanes are formed in the reaction of monoorganoaminofluorosilanes with butyllithium if either bulky or mesomeric stabilizing substituents are present. In the reaction of lithio-aminofluorosilanes with polar compounds LiF is eliminated and addition to the intermediate sila-imine is observed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 1444-1448 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Substitution and Ring Contraction at the Cyclotrisilazane System1-(Fluordimethylsilyl)-3-lithio-2,2,4,4,6,6- hexamethyl-5-(trimethylsilyl)cyclotrisilazane (1) reacts with compounds containing an acidic H-atom like ROH and R′C ≡ CH in a molar ratio of 1:1 to give the substituted compounds 2, 3 (R=C2H5, CH3), 7 (R′=n-C4H9), and LiF. Ring contraction with formation of four-membered rings is observed in the analogue reaction with the substituents R=CH3 (4), C6H5 (5) as well as R′=n-C4H9 (8) and C6H5 (9), resp.
    Notes: 1-(Fluordimethylsilyl)-3-lithio-2,2,4,4,6,6- hexamethyl-5-(trimethylsilyl)cyclotrisilazan (1) reagiert mit H-aciden Verbindungen wie ROH und R′C ≡ CH im Molverhältnis 1:1 zu den substituierten Verbindungen 2, 3 (R=C2H5, CH3), 7 (R′=n-C4H9) und LiF. Ringkontraktion zu viergliedrigen Ringen wird in analoger Reaktion für die Substituenten R=CH3 (4), C6H5 (5) sowie R′=n-C4H9 (8) und C6H5 (9) beobachtet.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 429 (1977), S. 63-68 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cyclisation of New TrimethylsilylalkylaminohalosilanesCompounds of the composition RSiCl2NR′SiMe3 (R = Cl, CH3, C2H5, C6H5; R′ = CH3, C2H5, C(CH3)3) are obtained by the reaction of silicon halides with the lithium salts of silylamines. Under suitable experimental conditions the reaction leads to the formation of the corresponding Si—N four- and six-membered ring systems (RSiHalNR′)n (Hal = F, Cl; n = 2 or 3) under elimination of trimethylhalosilane. The i.r., mass, 35Cl-n.q.r., 1H and 19F-n.m.r. spectra of these compounds are reported.
    Notes: Bei der Umsetzung von Halogensilanen mit lithierten Silylaminen sind Verbindungen der Zusammensetzung RSiCl2NR′SiMe3 (R = Cl, CH3, C2H5, C6H5; R′ = CH3, C2H5, C(CH3)3) darstellbar. Durch geeignete Versuchsbedingungen führt die Reaktion unter Abspaltung von Trimethylhalogensilan zur Bildung von entsprechenden Si—N-Vier- bzw. Sechsringsystemen des Typs (RSiHalNR′)n (Hal = F, Cl; n = 2 oder 3). Die IR-, Massen-, 35Cl-NQR- und 1H- bzw. 19F-NMR-Spektren der isolierten Verbindungen werden mitgeteilt.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 482 (1981), S. 65-72 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions and Bridging of 1,2-Diaza-3-sila-5-cyclopentenes1,2-Diaza-3-sila-5-cyclopentenes react with butyllithium to give lithium salts. In reactions of the lithium salts with halosilanes (1-7), trimethyltinchloride (8) or methyliodide (9) substituted compounds are obtained by LiHal elimination. Bromosuccinimide brominates the methylene group of the ring system (10). Bridging of 1,2-diaza-3-sila-5-cyclopentenes by boryl and silyl groups are described (11-13). In the reaction of trifluorophenylsilane with lithiated 1, 2-tert.-butyl-4-lithio-3,3,5-trimethyl-4-fluorodimethylsilyl-1,2-diaza-3-sila-5-cyclopentene, which is stable in solution, a second substitution takes place (14). The thermal elimination of LiF from lithiated 1 leads to the formation of the spirocyclic compound 15. The n.m.r. and mass spectra of the compounds are reported.
    Notes: 1,2-Diaza-3-sila-5-cyclopentene reagieren mit Butyllithium unter Bildung von Lithiumsalzen. In Umsetzungen der Lithiumsalze mit Halogensilanen (1-7), Trimethylzinnchlorid (8) und Methyliodid (9) werden Substitutionsverbindungen unter LiHal-Abspaltung erhalten. Bromsuccinimid bromiert die Methylengruppe des Ringsystems (10). Verknüpfungen der 1,2-Diaza-3-sila-5-cyclopentene über Boryl- und Silylgruppen werden beschrieben (11-13). Trifluorphenylsilan reagiert mit dem in Lösung stabilen lithiierten 1, 2-tert.-Butyl-4-lithio-3,3,5-trimethyl-4-fluordimethylsilyl-1,2-diaza-3-sila-5-cyclopenten, unter Zweitsubstitution (14). Die thermische LiF-Abspaltung aus lithiiertem 1 führt zur Bildung der spirocyclischen Verbindung 15. Die NMR- und Massenspektren der Verbindungen werden mitgeteilt.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 1510-1514 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Reaction of N.N′-Bis(trichlorophosphoranylidene)sulfamideSO2(NPCl3)2 reacts with silylamines (CH3)3SiNHR (R = C2H5, C3H7, C4H9) in a molar ratio of 1 : 2 to give 1, 2 and 3, with (CH3)3SiNHCH3 in a molar ratio of 1 : 1 to give the cyclic compound 41,2). From SO2(NPCl3)2 and disilylamines the compounds 5 and 6 can be obtained. The reaction of SO2[NPCl2N(C2H5)2]22) with [(CH3)3Si]2NCH3yields the heterocyclic compound 7. - The i.r., mass, 1H and 31P n.m.r. spectra of these compounds are reported.
    Notes: SO2(NPCl3)2 reagiert mit Silylaminen (CH3)3SiNHR (R = C2H5, C3H7, C4H9) im Molverhältnis 1 : 2 zu 1, 2 und 3, mit (CH3)3SiNHCH3 im Molverhältnis 1 : 1 zu der cyclischen Verbindung 41,2). Aus SO2(NPCl3)2 und Disilyaminen konnten die Verbindungen 5 und 6 gewonnen werden. Schließlich ist aus SO2[NPCl2N(C2H5)2]22) und [(CH3)3Si]2NCH3 die cyclische Verbindung 7 zugänglich. - Die IR-, Massen- und 1H- bzw. 31P-NMR-Spektren dieser Verbindungen werden mitgeteilt.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 155-158 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation of New [Bis(trimethysilyl)amino]flourosilanesAlkyl- and phenyl-substituted silicon fluorides react with lithium or sodium bis(trimethylsilyl)-amide in a molar ratio 1:1 to give compounds like RSiF2N(SiR3)2 and R2SiFN(SiR3)2 (R=H, CH3, C2H5, CH2=CH, C6H5) (1-7). Spectral data of these compounds are reported.
    Notes: Alkyl- und phenylsubstituierte Siliciumfluoride reagieren mit Lithium- bzw. Natrium-bis(trimethylsilyl)amid im Molverhältnis 1:1 zu Verbindungen des Typs RSiF2N(SiR3)2 und R2SiFN(SiR3)2 (R=H, CH3, C2H5, CH2=CH, C6H5) (1-7), deren Spektren kurz diskutiert werden.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 1277-1283 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Lithio-hexamethylcyclotrisilazane with Silicon-Fluoro Compounds1-Mono- and 1,3-dilithio-2,2,4,4,6,6-hexamethylcyclotrisilazane (2, 9) react with silicon tetrafluoride or difluorodiorganylsilanes RR′SiF2 (R = F, H, CH3, C6H5 R′ = CH3, C6H5) under LiF-elimination to give the cyclotrisilazanes 3-8, 10, and 11. The di- and trisubstituted compounds 12-14 are obtained by the reaction of 2 with CH3HSiF2 and CH3SiF3 in a molar ratio of 1:1. Ring coupling by a silicon bridge is achieved by the reaction of SiF-substituted cyclotrisilazanes with lithium tert-butylamide (15), or by the reaction of these compounds with two moles of a lithiocyclotrisilazane (16). The mass, 1H-, and 19F n.m.r. spectra of the compounds are reported.
    Notes: Mono- und dilithiiertes 2,2,4,4,6,6-Hexamethylcyclotrisilazan (2, 9) reagieren mit Siliciumtetra-fluorid oder mit Difluordiorganylsilanen des Typs RR′SiF2 (R = F, H, CH3, C6H5; R′ = CH3, C6H5) unter LiF-Abspaltung zu den Cyclotrisilazanen 3-8, 10 und 11. Die di- und trisubstituierten Verbindungen 12-14 sind in der Reaktion von 2 mit CH3HSiF2 sowie CH3SiF3 im Molverhältnis 1:1 erhältlich. Ringverknüpfungen über eine Siliciumbrücke gelingen durch Umsetzung der SiF-substituierten Cyclotrisilazane mit Lithium-tert-butylamid (15) sowie durch Umsetzung dieser Verbindungen mit einem weiteren mol eines lithiierten Cyclotrisilazanes (16). Die Massen-, 1H- und 19F-NMR-Spektren dieser Verbindungen werden mitgeteilt.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 2342-2347 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A Novel 1,3,5,7-Tetraaza-2,4,6,8-tetrasilabicyclo[4.2.0]octaneThe reaction of mono- and dilithio-2,2,4,4,6,6-hexamethylcyclotrisilazane (1, 2) with aminofluorosilanes R—SiF2—NR′SiMe3 (R=F, Me; R′=CMe3, SiMe3) leads to LiF elimination and formation of the cyclotrisilazanes 3-5. The cyclodisilazane 6 is obtained by ring contraction in the reaction of compound 5 with butyllithium and F3SiN(CMe3)(SiMe3). The lithium salt of 5 forms the novel title compound 7 by an intramolecular reaction with LiF- elimination, silyl group and methanide ion migration. Another bicyclic compound 8 is obtained in the reaction of 2 with C4H9Li and F2SiMeN(SiMe3)2. The reaction mechanism is discussed.
    Notes: Mono- und dilithiiertes 2,2,4,4,6,6-Hexamethylcyclotrisilazan (1, 2) reagieren mit Aminofluorsilanen des Typs R—SiF2—NR′SiMe3 (R=F, Me; R′=CMe3, SiMe3) unter LiF-Abspaltung zu den Cyclotrisilazanen 3-5.5 reagiert mit Butyllithium und F3SiN(CMe3)(SiMe3) unter Ringkontraktion zum Cyclodisilazan 6. Intramolekular bildet das Lithiumsalz von 5 unter LiF-Abspaltung, Silylgruppen- und Methanid-Ionen-Wanderung die neuartige Titelverbindung 7. Ein weiterer Bicyclus (8) entsteht bei der Umsetzung von 2 mit C4H9Li und Me—SiF2—N(SiMe3)2. Der Bildungsmechanismus wird diskutiert.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 3277-3282 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Acyclic and Cyclic NH—SiF Systems - Stepwise Condensation of (Fluorosily)aminesThe stepwise synthesis of the cyclodi- and -trisilazanes (R2SiNH)2, 3 (3a, b, 4a, b) via acyclic compounds is achieved from difluorosilanes (R2SiF2) and LiNH2 (R = CHMe2, CMe3). From the reaction of tert-butyltrifluorosilane with LiNH2, 3-, 5-, 7-, 9-, and 11-membered compounds containing NHSiF chains (13, 14, 20, 22, 23) and the cyclic cis- and trans-trisilazanes (CMe3SiFNH)3 have been isolated. The reaction involves substitution, lithium exchange, and condensation.
    Notes: Ausgehend von Difluorsilanen (R2SiF2) und LiNH2 gelingt der schrittweise Aufbau der Cyclodi- und -trisilazane (R2SiNH)2, 3 (3a, b, 4a, b) über entsprechende acyclische Verbindungen (R = CHMe2, CMe3). In der Reaktion von tert-Butyltrifluorsilan mit Lithiumamid werden 3-, 5-, 7-, 9- und 11-gliedrige kettenförmige NHSiF-Verbindungen (13, 14, 20, 22, 23) sowie die cyclischen cis- und trans-Trisilazane (CMe3SiFNH)3 (16, 17) isoliert. Die Reaktion verläuft unter Substitution, Umlithiierung und Kondensation.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 4561-4566 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Fluorosilylamines R2SiF-NH2, R = iPr (1), NMeSiMe3 (2), are obtained by the reaction of the difluorosilanes with LiNH2. 1 and 2 react with BuLi to give the corresponding lithium salts 1a and 2a. The LiF elimination from 1a leads to the formation of cyclodi-, -tri-, and -tetrasilazanes (4-6). From 2a only cyclodisilazane 3 is formed. Substitution takes place in reactions of 1a and 2a with halogenosilanes (7,8). Stepwise synthesis of NH-functional cyclodisilazanes is possible (12). Mono- (12-15) and disubstituted (16-18) cyclodisilazanes are isolated. Ring coupling to 19 is achieved in the reaction of 17 with lithiated 4.
    Notes: Fluorsilylamine R2SiF—NH2, R = iPr(1), NMeSiMe3 (2), werden durch Reaktion der Difluorsilane mit LiNH2 erhalten. 1 und 2 reagieren mit BuLi zu den entsprechenden Lithiumsalzen 1a und 2a. LiF-Abspaltung aus 1a führt zur Bildung von Cyclodi-, -tri- und -tetrasilazanen (4-6). Aus 2a entsteht nur das Cyclodisilazan 3. Mit Halogensilanen reagieren 1a und 2a unter Substitution (7,8). Die schrittweise Bildung von NH-funktionellen Cyclodisilazanen ist möglich (12). Mono- (12-15) und disubstituierte (16-18) Cyclodisilazane wurden isoliert. Ringkopplung zu 19 erfolgt in der Reaktion von 17 mit lithiiertem 4.
    Type of Medium: Electronic Resource
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