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  • 1970-1974  (15)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Studien zur 1,2-Addition von Halogenboranen an die Nitrilgruppe (1970)
    Springer
    Monatshefte für Chemie 101 (1970), S. 753-761 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract By reacting variously substituted nitriles with trihalo-, organodihalo- and diorgano-haloboranes it is shown that insertion into B-halogeno bonds occurs if CN-groups are carrying electron attracting substituents. No insertion is observed with trifluoroborane and some organohaloboranes of diminished reactivity. Nitriles substituted by groups of low electronegativity yield nitrile-haloborane adducts.
    Notes: Zusammenfassung Durch Umsetzung von verschiedenartig substituierten Nitrilen mit Trihalogen-, Organodihalogen- und Diorganohalogenboranen wird gezeigt, daß Nitrile, in denen die CN-Gruppen elektronenanziehende Substituenten tragen, mit entsprechend aktiven Halogenboranderivaten unter Einschiebung in die B-Halogenbindung zu monomeren oder dimeren Iminoboranen reagieren. Nitrile mit weniger elektronegativen Substituenten geben Nitril-Halogenborane.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00909894
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  • 2
    Electronic Resource
    Electronic Resource
    Schwefelsubstituierte Iminoborane, 1. Mitt.: Thioborierung von Nitrilen und Thiocyanaten (1970)
    Springer
    Monatshefte für Chemie 101 (1970), S. 1104-1108 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Thioboration of nitriles yields (B)-S substituted iminoboranes. Iminoboranes containing two thio substituents on each B- and C-atom are formed in the reaction of organo thiocyanates and tris(organothio)boranes. Characteristic group frequencies in the IR spectra of the monomeric and dimeric forms are discussed.
    Notes: Zusammenfassung (B)-S substituierte Iminoborane entstehen bei der Thioborierung von Nitrilen. Organothiocyanate ergeben bei der Reaktion mit Tris(organothio)boranen Iminoboranderivate mit je zwei Thioorganoresten an den B- und C-Atomen. Charakteristische IR-Gruppenfrequenzen der monomeren bzw. dimeren Derivate werden diskutiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00908554
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  • 3
    Electronic Resource
    Electronic Resource
    Schwefelsubstituierte Iminoborane, 2. Mitt.: Umsetzungen monomerer Iminoborane mit Organothiolen (1971)
    Springer
    Monatshefte für Chemie 102 (1971), S. 121-126 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Alkylthioiminoborane hydrobromides are formed by the reaction of monomeric bromo-substituted iminoboranes with alkylthiols. Thermal dehydrobromination yields the free C−S substituted iminoboranes, while dehydrobromination with triethylamine leads to rather unstable thioesterimides along with triethylamine adducts of the boron components. Under the same conditions phenylthiol also replaces bromine bonded to boron yielding iminoboranes with phenylthio groups at both boron and carbon.
    Notes: Zusammenfassung Monomere brom-substituierte Iminoborane reagieren mit Alkylthiolen unter Bildung von Alkylthioiminoboran-hydrobromiden. Bei der thermischen Dehydrobromierung entstehen daraus die freien C−S-substituierten Iminoborane, bei der Dehydrobromierung mit Triäthylamin die wenig beständigen Thioesterimide neben Triäthylaminaddukten der Borkomponente. Mit Phenylthiol wird unter denselben Bedingungen auch an Bor gebundenes Brom ersetzt, wobei Iminoborane mit Phenylthiogruppen an B und C erhalten werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00909218
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  • 4
    Electronic Resource
    Electronic Resource
    Schwefelsubstituierte Iminoborane, 3. Mitt.: Dimere (C)−S-substituierte Iminoborane (1971)
    Springer
    Monatshefte für Chemie 102 (1971), S. 131-143 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract (C)−S substituted iminoboranes were obtained from the reaction of organothiocyanates with trialkylboranes or trichloroborane, insertion of nitriles into B−S bonds of organothio-dichloroboranes or by substituting C-halogens by organothiols, the latter reaction yielding unsymmetrical substituted bis-(iminoboranes) too. Compounds obtained are dimeric or monomeric according to the substitution-pattern. Some of the dimeric derivatives have unusual hydrolytic stability. Characteristic i.r.-bands, mass and nmr-spectra are discussed.
    Notes: Zusammenfassung (C)−S-substituierte Iminoborane wurden durch Reaktion von Organothiocyanaten mit Trialkylboranen oder Trichlorboran, Einschiebung von Nitrilen in die B−S-Bindung von Organothiodichlorboranen oder Substitution von C-Halogenresten in Bis(iminoboranen) durch Organothiole hergestellt, wobei letztere Reaktion auch unsymmetrische Produkte liefert. Die erhaltenen schwefelsubstituierten Iminoborane liegen entweder dimer oder als Gleichgewichtsgemisch zwischen dimerer und monomerer Form vor. Einige der Verbindungen sind ungewöhnlich stabil gegen Hydrolyse. Charakteristische IR-Banden, NMR- und Massen-Spektren werden diskutiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00909220
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  • 5
    Electronic Resource
    Electronic Resource
    Reaktionen von Aminoboranen und Hydrazinoboranen mit Carbonyl- und Thiocarbonylverbindungen (1972)
    Springer
    Monatshefte für Chemie 103 (1972), S. 577-580 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Bei der Aminoborierung von Carbonylsulfid erfolgt 1,2-Addition an die Carbonylgruppe, wobei in Tris(dimethylamino)boran zwei der B−N-Bindungen, in Bis(dimethylamino)chlorboran nur eine B−N-Bindung reagieren. In Tris(2,2-dimethylhydrazino)boran reagieren alle drei B−N-Bindungen mit CO2; mit CS2 erfolgt unter den gleichen Bedingungen keine Reaktion. Mit Phosgen und Thiophosgen reagiert Tris(dimethylamino)boran unter Bildung von Bis(dimethylamino)chlorboran und substituierter Carbamide.
    Notes: Abstract Upon aminoboration of carbonyl sulfide 1,2-addition to the carbonyl group is observed. In tris(dimethylamino)borane insertion into two of the B−N bonds occurs, while in bis(dimethylamino)chloroborane only one B−N bond reacts with OCS. In tris(2,2-dimethylhydrazino)borane all three B−N bonds react with CO2, while with CS2 no insertion reaction is observed under comparable conditions. Tris(dimethylamino)borane reacts with phosgene and thiophosgene with formation of bis(dimethylamino)chloroborane and substituted carbamides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00904960
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  • 6
    Electronic Resource
    Electronic Resource
    Umsetzungen von Methylisonitril mit Aluminiumverbindungen (1970)
    Springer
    Monatshefte für Chemie 101 (1970), S. 627-628 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00910253
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  • 7
    Electronic Resource
    Electronic Resource
    Hydroborierung von Isonitrilen (1970)
    Springer
    Monatshefte für Chemie 101 (1970), S. 648-654 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Isonitriles react with diborane or disiamylborane resp. to yield 2,5-diboradihydropyrazines, which rearrange upon thermal treatment to yield diborapiperazines or other compounds. Due to the high reactivity isonitriles are hydroborated even by borazine B−H-groups yielding B-carbiminoborazines. The isonitrile group also inserts into the B−B bond of tetrakis-(dimethylamino)diboran(4) leading to derivatives of iminobis-(diaminoboryl)methane. *** DIRECT SUPPORT *** A3615139 00003
    Notes: Zusammenfassung Durch Umsetzung von Isonitrilen mit Diboran bzw. Disiamylboran entstehen Derivate des 2,5-Diboradihydropyrazins, die sich thermisch entweder in Diborapiperazinderivate oder in andere Verbindungen umlagern lassen. Infolge der hohen Reaktivität der Isonitrile wirken auch Borazine hydroborierend, wobei symmetrische und unsymmetrische B-Carbiminoborazine entstehen. Mit Tetrakis(dimethylamino)diboran(4) erfolgt Einschiebung der Isonitrilgruppe in die B−B-Bindung, die zu Derivaten des Iminobis(diaminoboryl)-methans führt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00909879
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  • 8
    Electronic Resource
    Electronic Resource
    Umsetzungen von Metall- und Metalloidverbindungen mit mehrfunktionellen Molekülen, 1. Mitt.: Die Reaktion von Diboran mit 2-Aminobenzonitril und 2-Amino-1-cyclopenten-1-carbonsäurenitril (1973)
    Springer
    Monatshefte für Chemie 104 (1973), S. 1055-1063 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The reaction of 2-aminobenzonitrile with diborane yielded 2-cyano-phenylamine-borane, bis(2-cyanophenylamino)borane, 2.3′-bis(1.3.2-diazabora-3.4-dihydronaphthalene) and at elevated temperatures 5,8.13.16.21.24-hexahydro-borazino[2.1-b: 4.3-b′:6.5-b″]tris[1.3.2]diazaboranaphthalene. This borazine compound and 2.3′-bis(1.3.2-diazaboradihydronaphthalene) were also obtained from 2-aminobenzylamine-borane. Analogous reactions with 2-amino-1-cyano-1-cyclopentene only led to bis(2-cyano-1-cyclopentenylamino)-borane and to polymeric products. Structures were established by analyses, i.r.- and n.m.r.-spectroscopy and by mass-spectrometric fragmentation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00903922
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  • 9
    Electronic Resource
    Electronic Resource
    Massenspektrometrische Untersuchungen von PhthalocyaninenPc—MeX n (1974)
    Springer
    Monatshefte für Chemie 105 (1974), S. 327-333 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract PhthalocyaninesPc−Me(III)X andPc−Me(V)X 3 were obtained by reacting anhydrous metal halides with phthalodinitrile and di-lithium-phthalocyanine, resp. A phthalocyanine containing niobium(V) was prepared for the first time. Mass spectrometric investigation of the products formed show the molecular ion in the case of chloro-aluminum-, chloro-indium- and tribromo-niobium-phthalocyanine. The mass spectra of chloro-scandium-, chloro-yttrium- and tribromo-tantalum-phthalocyanine showed neither peaks of the molecular mass nor metal containing fragments of the phthalocyanine structure. Mass spectrometric results seem to depend critically on the purity of the compounds employed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00907380
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  • 10
    Electronic Resource
    Electronic Resource
    Umsetzungen von Metall- und Metalloidverbindungen mit mehrfunktionellen Molekülen, 2. Mitt.: Reaktionsprodukte von Aminobenzonitrilen mit Halogenboranen (1974)
    Springer
    Monatshefte für Chemie 105 (1974), S. 637-647 
    Details
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Both 4-aminobenzonitrile and 3-aminobenzonitrile react with halogenoboranes to yield mainly the corresponding amine-halogenoboranes and further products derived from the latter by elimination of hydrogen halide. In contrast, reaction between halogenoboranes and 2-aminobenzonitrile leads to insertion of the nitrile group into one of the B-halogen bonds. Derivatives of the 1.3.2-diazaboranaphthalene ring result from reactions of the insertion products with the amino group with or without elimination of hydrogen halides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00912615
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