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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Transition metal chemistry 12 (1987), S. 301-306 
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Several carboxy-substituted ferrocene compounds are prepared and investigated by cyclic voltammetry in acetonitrile solution. The half-wave potentials of most of the acids studied (E 1/2=0.34−0.58 V versus s.c.e.) are more positive than that of ferrocene (0.33 V), reflecting a diminished susceptibility to oxidation of these compounds relative to the parent metallocene. Only β-ferrocenylpropionic acid (0.325 V) is effectively identical with the latter in its oxidation behaviour, and γ-ferrocenylbutyric acid (0.31 V) tends to be more readily oxidized. The results are of interest for subsequent chemical oxidation studies of ferrocenylcarboxylic acids.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 375-388 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Anodic Fragmentation of O-Acylated α-Hydroxy Carboxylic AcidsDepending on the degree of substitution at the α-carbon atom, the electrolyses of O-acylated α-hydroxy carboxylic acids 1 yield products of fragmentation (aldehydes or ketones 5) and products derived from acylium ions 4 in concurrence with simple anodic substitution products (acylales, amides, and imides, respectively). Dioxiranyl cations 2 are involved as intermediates. The fragmentation of the dioxiranyl cation 2 is investigated by semiempirical MINDO/3 calculations (Scheme 1).
    Notes: Die Elektrolyse O-acylierter α-Hydroxycarbonsäuren 1 liefert über Dioxiranyl-Kationen 2 als Zwischenstufen je nach Substitutionsgrad am α-Kohlenstoffatom von 1 Fragmentierungsprodukte (Aldehyde oder Ketone 5) und Folgeprodukte von Acylium-Ionen 4 in Konkurrenz zu einfachen anodischen Substitutionsprodukten (Acylale bzw. Amide und Imide). Die Fragmentierung des Dioxiranyl-Kations 2 (Schema 1) wurde mit semiempirischen Methoden (MINDO/3) untersucht.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
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