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  • 1990-1994  (1)
  • 1970-1974
  • 2,4,6-Tri-t-butylphenyl-substituted iminoboranes  (1)
Material
Years
  • 1990-1994  (1)
  • 1970-1974
Year
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 1474-1478 
    ISSN: 0044-2313
    Keywords: 2,4,6-Tri-t-butylphenyl-substituted iminoboranes ; thermal condensation ; benzo[1]borolanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Supermesityl stabilized Iminoboranes. IIINew Iminoboranes R—B=N—R′ (R = 2,4,6(t-Bu)3C6H2), IIa-IIf, were obtained by base-induced HF-elimination from RBF—NHR′ (Ia-Ie) or directly from RBF2 and lithiated H2NR′ (for IIf). Compounds II exhibit a differentiated behaviour upon thermal treatment depending on R′. While IIa (R′ = H) immediately reacts to give the corresponding benzo[1]borolane IIIa, the dimeric diazadiboretidine is formed from IIb (R′ = Me) at 100°C; IIc (R = Et) and IId (R = C6H5) deliver the benzo[1]borolanes IIIc and IIId when they are heated to 180°C (in melt). IIe (R = 2,6(i-Pr)C6H3) and IIf (R = adamantyl) are stable at 250°C. All compounds were characterized by elemental analyses and spectroscopically (MS, IR, NMR: 1H, 13C, 11B, 19F and in part 15N).
    Notes: Neue Iminoborane R—B=N—R′ (R = 2,4,6(t-Bu)3C6H2), IIa-IIf, wurden durch baseninduzierte HF-Eliminierung aus RBF—NHR′ (Ia-Ie) oder direkt aus RBF2 und lithiiertem H2NR′ (für IIf) erhalten. Die Verbindungen von Typ II zeigen in Abhängigkeit von R′ ein ausgeprägt differenziertes Verhalten bei thermischer Belastung. Während IIa (R′ = H) sofort zum entsprechenden Benzo[1]borolan IIIa weiterreagiert, ergibt IIb (R′ = Me) bei 100°C das dimere Diazadiboretidin IVb, während IIc (R = Et) und IId (R — C6H5) erst als Schmelze bei 180°C zu den Benzo[1]borolanen IIIc und IIId reagieren. IIe (R = Adamantyl) und IIf (R = 2,6-(i-Pr)2C6H3) sind bei 250°C stabil. Alle Verbindungen wurden elementaranalytisch und spektroskopisch (MS, IR, NMR: 1H, 13C, 11B, 19F und teilweise 15N) charakterisiert.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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