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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 1627-1639 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Substituent Constants of the Pyrazol, 1,2,3-Triazol, Benzotriazol, and Naphthotriazol GroupThe synthesis of benzoic acids with the title substituents in p- and m-position (15, 13, 11, 9) and their ethyl and methyl esters is described. The σp and σm values of the substituents obtained by alkaline hydrolysis of the esters in ethanol/water and methylcellosolve/water demonstrate an inductive electron withdrawing and a mesomer electron donating effect of these groups which are important for dye chemistry.
    Notes: Die Synthese von Benzoesäuren mit den im Titel genannten Resten in m- bzw. p-Position (15, 13, 11, 9) sowie ihrer Ethyl- und Methylester wird beschrieben. Über deren alkalische Verseifung in Ethanol/Wasser und Methylcellosolve/Wasser werden die Substituentenkonstanten σp und σm der Reste bestimmt. Sie deuten auf eine induktive Elektronenacceptor-und mesomere Elektronendonator-Wirkung dieser für die Farbstoff-Chemie wichtigen Substituenten hin.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 1981-1987 
    ISSN: 0009-2940
    Keywords: Rubicene ; Hydrocarbons, polycyclic ; Dyes, fluorescent ; Singlet oxygen sensitizer ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis of Highly Pure Rubicene and Rubicene DerivativesA simple one-step synthesis of highly pure rubicene (2) from fluorenone (1) and magnesium with 24% yield is described and compared with other preparation procedures. Mono- and disubstituted rubicene derivatives are prepared by electrophilic aromatic substitution.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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