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  • Electronic Resource  (5)
  • 1970-1974  (5)
  • 1970  (5)
Material
  • Electronic Resource  (5)
Years
  • 1970-1974  (5)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 101 (1970), S. 753-761 
    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
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 101 (1970), S. 1104-1108 
    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
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 101 (1970), S. 627-628 
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 101 (1970), S. 648-654 
    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
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 101 (1970), S. 387-395 
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract 2.2.4.4-Tetrachlorocyclodiborazanes of bis(iminoboran) type can be alkylated in non-etheric solvents to yield the corresponding 2,4-dibutyl derivates by C4H9MgCl while C4H9Li yields the tetrabutyl compounds. Reaction of 2.2.4.4-tetrahalogenocyclodiborazanes with NaN3 in CH3CN gives B-tetrazidocyclodiborazanes, while 2.4-dialkyl-2.4-dihalogenocyclodiborazanes lead to dialkyldiazido compounds. Upon full alkylation on the B-atoms also halogeno substituents on the imino C-atoms are substituted by N3 using a large excess of NaN3. In some cases splitting of the cyclodiborazane ring was observed.
    Notes: Zusammenfassung 2,2,4,4-Tetrachlorcyclodiborazane von Bis(iminoboran)-Typ geben in nicht-äther. Lösung mit Butylmagnesiumchlorid entsprechende 2,4-Dibutyl-2,4-dichlorverbindungen, mit Butyl-Li 2,2,4,4-Tetrabutylderivate. Die Azidierung von 2,2,4,4-Tetrahalogenocyclodiborazanen mit NaN3 in CH3CN führt zu den B-Tetrazidoverbindungen, jene von 2,4-Dihalogeno-2,4-dialkylcyclodiborazanen zu 2,4-Diazido-2,4-dialkylcyclodiborazanen. Bei großem Azidüberschuß können in 2,2,4,4-Tetraalkylcyclodiborazanen auch Halogenatome an den Iminkohlenstoffen azidiert werden. In einigen Fällen wurde Spaltung des Cyclodiborazans beobachtet.
    Type of Medium: Electronic Resource
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