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  • Electronic Resource  (3)
  • 2000-2004
  • 1965-1969  (3)
  • Chemistry  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Bromide Alkoxides of Tantalum (1967)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 36 (1967), S. 24-28 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions of tantalum pentaalkoxides (ethoxide, isopropoxide and tertiarybutoxide with acetyl bromide give the products: Ta(OEt)4Br; Ta(OEt)3Br2; Ta(OEt)2Br3 · MeCO2Et; Ta(OEt)Br4 · MeCO2Et; Ta(OPr1)4Br; Ta(OPr1)3Br2; Ta(OPr1)2Br3 · MeCO2Pr1; TaOBr3. MeCo2Pr1; Ta(OBut)4Br and TaOBr3 · MeCO2But. These products were found to be viscous liquids or solids. All these bromide alkoxides except the tertiarybutoxide derivatives were found to be soluble in benzene. The tetraalkoxide monobromide derivatives could either be distilled or sublimed unchanged under reduced pressure. The tetraalkoxide monobromide derivative was found to be dimeric in boiling benzene.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19670360104
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Organic compounds of niobium and tantalum. Reactions of niobium and tantalum pentaethoxides with glycols (1967)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 351 (1967), S. 219-224 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Neue Niob- und Tantalverbindungen der Typen (EtO)3M(glycol), (EtO)M(glycol)2 und M(glycol)3 wurden aus den Pentaäthoxiden und verschiedenen Glykolen (z. B. Butan-1.3-diol) hergestellt. Sofern in Benzol löslich, sind die Verbindungen darin dimer.
    Notes: Following three types of new compounds (EtO)3M(glycol), (EtO)M(glycol)2 and M(glycol)3 (where M is niobium or tantalum) were isolated by the reactions of niobium and tantalum pentaethoxides with various glycols (butane-1.3-diol, neopentyl glycol and hexane-1.6-diol). Molecular weights of the few soluble compounds show that they are dimeric in benzene.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19673510312
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Organic derivatives of niobium and tantalum. Reactions of Niobium and Tantalum Pentaethoxides with catechol (1967)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 353 (1967), S. 109-112 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Die Reaktion der Pentaähoxide von Niob und Tantal mit Brenzkatechin (B—H2) liefert die neuen Verbindungstypen (ÄtO)3M(B), (ÄtO)M(B)2 und M(B)3. Die Mono- und Dibrenzkatechin-Derivate tauschen ihre Äthoxygruppen mit t-Butanol unter Bildung der entsprechenden t-Butoxy-Verbindungen aus.
    Notes: Reactions of niobium and tantalum pentathoxides with catechol have been studied in different stoichiometric ratios and the following three types of new derivatives, (EtO)3M (Catechol); (EtO)M(Catechol)2 and M(Catechol)3 (M = Nb; Ta) have been isolated. The mono- and di-catechol derivatives interchange their ethoxide groups with tertiary butanol yielding the corresponding tertiary butoxide derivatives.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19673530115
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    Paper (German National Licenses)
    Fulltext
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