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  • 2000-2004
  • 1985-1989  (16)
  • 1980-1984  (15)
  • Inorganic Chemistry  (31)
  • 1
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Existence of a Silaolefin: Synthesis and Crystal Structures of Wittig and Diels-Alder Products in Reactions of Lithiated (Fluorosilyl)diazasilacyclopentenes with Benzaldehyde and MethacroleinLithium salts of 1,2-diaza-3-sila-5-cyclopentenes react with fluorosilanes and aminofluorosilanes to give 4-(fluorosilyl)-substituted compounds 1 - 4. By reaction with tert-butyllithium 1 - 4 themselves form lithium salts 5 - 8, which react with fluorosilanes in a second substitution giving 9 and 10.5 and 7 undergo a Wittig-type reaction with benzaldehyde to form the benzylidene derivative 11. Spirocyclic Diels-Alder adducts (12, 13) are obtained from the reaction of 5 and 6 with 2-methyl-2-propenal. The propenylidene derivative 14 is formed as a by product. With excess 2-methyl-2-propenal, 12 reacts as a dienophile giving the oligocyclic Diels-Alder adducts 15 and 16. The crystal structures of 11 and 15 are reported.
    Notes: Lithiumsalze der 1,2-Diaza-3-sila-5-cyclopentene reagieren mit Fluorsilanen und Aminofluorsilanen zu den 4-(Fluorsilyl)-substituierten Verbindungen 1 - 4. In Reaktion mit tert-Butyllithium bilden 1 - 4 erneut Lithiumsalze (5 - 8), die mit Fluorsilanen unter Zweitsubstitution zu 9 und 10 reagieren. In Wittig-analoger Reaktion reagieren 5 und 7 mit Benzaldehyd zum Benzyliden-Derivat 11. Spirocyclische Diels-Alder-Addukte (12, 13) werden aus 5 und 6 mit 2-Methyl-2-propenal erhalten. Als Nebenprodukt entsteht das Propenyliden-Derivat 14. Mit überschüssigem Dien (2-Methyl-2-propenal) reagiert 12 als Dienophil zu den oligocyclischen Diels-Alder-Addukten 15 und 16. Kristallstrukturen von 11 und 15 werden mitgeteilt.
    Additional Material: 4 Tab.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 290-298 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of Cyclic Silylhydrazines - Crystal Structure of a Five-membered Cross Dimerisation ProductN,N-Bis(fluorosilyl)amines (1 - 3) react with dilithiated hydrazines to give four- and five-membered silylhydrazine rings (4 - 8). The isomerisation of a 3-(tert-butylamino)-1,3-diaza-2,4-disilacyclobutane (8) to a 1,2,4-triaza-3,5-disilacyclopentane (9) has been demonstrated. Lithium salts of silylhydrazines react with fluorosilanes to give substitution products (10 - 15). Dilithiated hydrazine reacts with Me2SiF2 yielding N(SiFMe2)3 (16). The formation of isomeric N-(fluorosilyl)-N,N′-bis(trimethylsilyl)- and N′-(fluorosilyl)-N,N-bis(trimethylsilyl)hydrazines has been accomplished via ring-closure reactions (17 - 19) and confirmed by the crystal structure determination of a five-membered ring cross dimer (19). The ten-membered bicyclic ring system (22) is obtained by the reaction of (14) with dilithiated hydrazine.
    Notes: N,N-Bis(fluorsilyl)amine (1 - 3) reagieren mit dilithiierten Hydrazinen zu vier- und fünfgliedrigen Silylhydrazinringen (4 - 8). Präparativ gelang der Nachweis der Isomerisierung eines 3-(tert-Butylamino)-1,3-diaza-2,4-disilacyclobutans (8) zum 1,2,4-Triaza-3,5-disilacyclopentan (9). Lithiumsalze von Silylhydrazinen reagieren mit Fluorsilanen unter Substitution (10 - 15). Dilithiiertes Hydrazin reagiert mit Me2SiF2 zu N(SiFMe2)3 (16). Die Bildung von isomeren N-(Fluorsilyl)-N,N′-bis(trimethylsilyl)- und N′-Fluorsilyl-N,N-bis(trimethylsilyl)hydrazinen wird durch Ringschlußreaktionen (17 - 19) nachgewiesen und durch die Kristallstrukturuntersuchung eines Kreuz-Dimeren-Fünfrings belegt (19). Der zehngliedrige Bicyclus 22 entsteht in der Reaktion des N,N′-Bis(fluordimethylsilyl)-N,N′-bis(trimethylsilyl)hydrazins(14) mit dilithiiertem Hydrazin.
    Additional Material: 1 Tab.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 3150-3157 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Addition Reactions of 1,1-Dicyano-2,2-bis(trifluoromethyl)etheneBy the reaction of the title compound (CF3)2C=C(CN)2 with PCl5 the (phosphoranyliden-amino)ethene 1 is obtained. The phosphorane 1 reacts with Me3SiNMe2 to form 2. WCl6 and MoCl5 react with (CF3)2C=C(CN)2 to give the acyclic nitrenes 3 and 4. The X-ray structure analysis of 3a, an acetonitrile adduct of 3, is reported.
    Notes: Die Titelverbindung (CF3)2C=C(CN)2 reagiert mit PCl5 zu dem (Phosphoranylidenamino)-ethen 1. Daraus entsteht 2 durch Reaktion mit Me3SiNMe2. Umsetzungen von (CF3)2C=C(CN)2 mit WCl6 und MoCl5 ergeben die acyclischen Nitrenkomplexe 3 und 4. Von 3a, einem Acetonitriladdukt von 3, wird eine Röntgenstrukturanalyse mitgeteilt.
    Additional Material: 1 Ill.
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  • 4
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Carbene-Analgous Reactions of the Products of Dehalogenation of Dichloro(diisopropylamino)borane with Aromatic Compounds and 1,2-DimethoxyethaneSodium complexes of aromatic compounds in 1,2-dimethoxyethane react with dichloro-diisopropylamino)borane to give compounds formed via carben(oidal) intermediates: From naphthalene 1,2-bis(diisopropylamino)-1,1a,2,8b-tetrahydroborireno[2,3-b][3]benzoborepine (1) is formed. From acenaphthylene 2-(diisopropylamino)-2,3-dihydro-1H-naphtho[1,8-cd]borine (2) and with 1-methylnaphthalene, in addition to 1,2-bis[(diisopropylamino)methoxyboryl]ethyne (3), (diisopropylamino)dimethoxyborane (4) is isolated. 1H-, 11B-, 13C-, 14N-, 15N NMR and MS data are given. For 3 the X-ray structure is reported.
    Additional Material: 1 Ill.
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  • 5
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Benzamidinato Complexes of Main Group and Transition Metals - Crystal Structures of PhC(NSiMe3)2TiCl2 and PhC3)2MoO2PhC(NSiMe3)2Li (3b) reacts with SiCl4, SnCl4, Me2SnCl2, Ph2SnCl2, TiCl4, ZrCl4, MoO2Cl2, and WO2Cl2 with formation of LiCl to yield the new amidinato complexes 4a-f, 5a and 5b. The X-ray structure analyses of 4e and 5a are reported.
    Notes: PhC(NSiMe3)2Li (3b) reagiert mit SiCl4, SnCl4, Me2SnCl2, Ph2SnCl2, TiCl4, ZrCl4, MoO2Cl2 und WO2Cl2 unter Bildung von LiCl zu den Amidinatokomplexen 4a-f, 5a und 5b. Von 4e und 5a wird die Röntgenstrukturanalyse mitgeteilt.
    Additional Material: 2 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 724-731 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: N,N′-Dihalogenoethanediirnidoyl DifluoridesThe title compounds XN=CF—CF=NX (13, 14, X = Cl, Br) are prepared in a simple way from the three components (CN)2, X2, and HgF2. The N-halogenated amino- or iminoperfluoroethanes Cl2N—CF2—CF2—NCl2 (11), ClN=CF—CF2—NCl2 (12), BrN=CF—CF2—NBr2 (15) and Br2N—CF2—CF2—NBr2 (16) were identified as further products. The structure of 14 was determined from single-crystal X-ray data.
    Notes: Die Titelverbindungen XN=CF—CF=NX (13, 14, X = Cl, Br) lassen sich in einfacher Weise aus den drei Komponenten Dicyan, X2 und HgF2 gewinnen. Als weitere Produkte konnten die N-halogenierten Amino- bzw. Iminoperfluorethane Cl2N—CF2—CF2—NCl2 (11), ClN=CF-CF2—NCl2 (12), BrN=CF—CF2—NBr2 (15) und Br2N—CF2—CF2—NBr2 (16) nachgewiesen werden. Aus Einkristall-Röntgenbeugungsdaten wurde die Struktur von 14 bestimmt.
    Additional Material: 2 Tab.
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  • 7
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Metal and Metalloid Compounds with Polyfunctional Molecules, XXXVIII. The Reaction of Ethanediamides with BromodimethylboraneReactions of symmetrically substituted N,N′-dialkyl-(diaryl)ethanediamides A with bromodimethylborane are investigated. Reactions in the molar ratio of 1 : 2 yield the 2,6-dioxonia-4,8-diaza-3,7-diboratabicyclo[3.3.0]octanes 1a - j, the N,N′-bis(dimethylboryl)-N,N′-diorganylethanediamides 4a, b, and the equilibrium mixtures 3a - d. By-products are 2-oxonia-4-oxa-6-azonia-8-aza-3,7-diboratabicyclo[3.3.0]octanes 2a - j. By the reaction of N,N′-diorganylethanediamides with bromodimethylborane in the molar ratio 1 : 1 the 1-oxonia-3-aza-2-boratacyclopentan-4-one derivatives 5a - e, N-(dimethylboryl)-N,N′-diorganylethanediamides 6a - c, the equilibrium mixtures 7a - d, and the 5-(alkylamino)-4-(alkylimonio)-2,2-dimethyl-1-oxonia-3-oxa-2-boratacyclopentane bromides 8a - h are obtained. X-ray analyses have been carried out for 1a, 5a, e and 8b.
    Notes: Es werden Reaktionen symmetrisch substituierter N,N′-Dialkyl-(Diaryl)ethandiamide A mit Bromdimethylboran untersucht. Die Reaktion im Molverhältnis 1 : 2 führt zu 2,6-Dioxonia-4,8-diaza-3,7-diboratabicyclo[3.3.0]octanen 1a - j, N,N′-Bis(dimethylboryl)-N,N′-diorganylethandiamiden 4a, b und den Gleichgewichtsmischungen 3a - d. Als Nebenprodukte treten 2-Oxonia-4-oxa-6-azonia-8-aza-3,7-diboratabicyclo[3.3.0]octane 2a - j auf. Bei der Umsetzung von N,N′-Diorganylethandiamiden mit Bromdimethylboran im Molverhältnis 1 : 1 erhält man die 1-Oxonia-3-aza-2-boratacyclopentan-4-on-Derivate 5a - e, N-(Dimethylboryl)-N,N′-diorganylethandiamide 6a - c, Gleichgewichtsmischungen 7a - d und 5-(Alkylamino)-4-(alkylimonio)-2,2-dimethyl-1-oxonia-3-oxa-2-boratacyclopenta n-bromide 8a - h. Für 1a, 5a, e und 8 b wurden Röntgenstrukturanalysen durchgeführt.
    Additional Material: 4 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 416-423 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 4-Chloro-1,2,3,5-dithiadiazolium SaltsThe synthesis of 4-chloro-1,2,3,5-dithiadiazolium chloride (9) from SCI2 and either N-cyanosulfur difluoride imide (8) or bis(trimethylsilyl)carbodiimide (12) is described. The analogous dibromide 13 is formed from S2Br2 and 8. The ionic chlorine in 9 may easily be exchanged with the help of silver salts, acids, and Lewis acids yielding ClCN2S2+A- (9a-d, A- = AsF6-, SbCl6-. ½SnCl62-, SO3-). The crystal structure of the hexafluoroarsenate 9a has been determined.
    Notes: Die Synthese von 4-Chlor-1,2,3,5-dithiadiazolium-chlorid (9) aus N-Cyanoschwefeldifluoridimid (8) bzw. aus Bis(trimethylsilyl)carbodiimid (12) und SCI2 wird beschrieben. Das zu 9 analoge Dibromid 13 entsteht aus 8 und S2Br2. Mit Hilfe von Silbersalzen, Säuren und Lewis-Säuren läßt sich das ionisch gebundene Chlor in 9 leicht austauschen unter Bildung von CICN2S2+A- (9a-d, A- = AsF6-, SbCl6-, ½SnCl62-, SO3F-). An dem Hexafluoroarsenat 9a wurde eine Kristallstrukturbestimmung durchgeführt.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 146-151 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cyclisation of (Fluorsilyl)phosphanes to 1,3-Diphospha-2,4-disilacyclobutanes - Crystal Structure DeterminationsLithiated tert-butylphosphane reacts with di-tert-butyldifluorosilane and with difluorobis[methyl(trimethylsilyl)amino]silane to give the (fluorosilyl)phosphanes 1 and 2 as well as the (di-tert-butylsilanediyl)bisphosphane 3. The cyclic compounds 4 and 5 are obtained in the reaction of 1 and 2 with tert-C4H9Li. Dilithiated 3 reacts with dichlorophenylphosphane to form the 1,2,3-triphospha-4-silacyclobutane 6. According to crystal structure analyses, 4 and 5 contain planar Si2P2 rings with Si—P bonds between 224.1(1) and 228.0(1) pm.
    Notes: Lithiiertes tert-Butylphosphan reagiert mit Di-tert-butyldifluorsilan und Difluorbis[methyl(trimethylsilyl)amino]silan zu den (Fluorsilyl)phosphanen 1 und 2 sowie zum (Di-tert-butylsilandiyl)-bisphosphan 3. Die cyclischen Verbindungen 4 und 5 werden durch die Umsetzung von 1 und 2 mit tert-C4H9Li erhalten. Dilithiiertes 3 reagiert mit Dichlorphenylphosphan zum 1,2,3-Triphospha-4-silacyclobutan 6. Nach Kristallstrukturanalysen besitzen 4 und 5 jeweils planare Si2P2-Ringe mit Si—P-Bindungen zwischen 224.1(1) und 228.0(1) pm.
    Additional Material: 3 Tab.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 1411-1414 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Adduct of Tin Tetrachloride and Bis(trimethylsilyl)sulfur DiimideBoth (CH3)3SiNSO and (CH3)3SiN=S=NSi(CH3)3 react with SnCl4 to yield the 1 : 1 adduct (CH3)3SiN=S=NSi(CH3)3 · SnCl4 (1). An X-ray analysis shows that the sulfur diimide functions as a bidentate ligand. 1 crystallizes in the space group P21/m with unit-cell constants a = 663.7(1), b = 1998.9(3), c = 696.7(1) pm, and β = 94.18(2)°.
    Notes: Sowohl (CH3)3SiNSO als auch (CH3)3SiN=S=NSi(CH3)3 reagieren mit SnCl4 unter Bildung des 1 : 1-Adduktes (CH3)3SiN=S=NSi(CH3)3 · SnCl4 (1). Eine Einkristallröntgenstrukturanalyse zeigt, daß das Schwefeldiimid als zweizähniger Ligand fungiert. 1 kristallisiert in der Raumgruppe P21/m mit den Zellkonstanten a = 663.7(1), b = 1998.9(3), c = 696.7(1) pm und β = 94.18(2)°.
    Additional Material: 1 Ill.
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