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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 112 (1981), S. 287-292 
    ISSN: 1434-4475
    Keywords: Activation energy ; Kinetics ; Methyl-vinyl ketone ; Polarography ; Polymerization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The homogeneous polymerization of methyl-vinyl ketone in diluted methanol solutions in presence of proton donors is studied using the polarographic method. The effect of the cation of the indifferent electrolyte is investigated as well as the influence of small quantities of H2O. Suggestions were made about the possible mechanisms of these influences in the general scheme of the process proposed byHolleck et al.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 101 (1970), S. 166-181 
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Abstract Ketones of the general structure C6H5(CH=CH) m ·CO(CH=CH) n ·C6H5 (wherem=0, 1, 2 andn=0, 1, 2) have been investigated. From the dependence of the limiting current and half wave potential on pH, from logarithmic analysis and fromKoutecký analysis a mechanism for the reduction was deduced. Several kinetic parameters of the electrode process have been estimated. The proposed reduction mechanism has been supported by correlating the measured half wave potential values with energies of the first antibonding MO's of protonated and neutral molecules.
    Notes: Zusammenfassung Es werden die Ketone folgender Reihe untersucht: C6H5(CH=CH) m ·CO(CH=CH) n ·C6H5 beim=0, 1, 2 undn=0, 1, 2. Auf Grund der Abhängigkeit des Grenzstromes und des Halbstufenpotentials vom pH, der logarithmischen Analyse der Strom-Spannungskurven sowie derKoutecký-Analyse wird ein Schema für den Reduktionsmechanismus vorgeschlagen. Es werden auch einige kinetische Parameter des Elektrodenprozesses abgeschätzt. Das vorgeschlagene Schema wird durch die gefundene Korrelation zwischen den erhaltenen Werten des Halbstufenpotentials und der Energien der ersten antibindenden MOs von protonierten und neutralen Formen unterstützt.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 108 (1977), S. 69-78 
    ISSN: 1434-4475
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Using data from preparative potentiostatic macroelectrolysis, IR spectroscopy of the isolated products and polarographic data, conclusions are drawn concerning the mechanism of electrode reduction of a series of α,ω-diphenyl polyene ketones. Electrolysis was carried out in 60% bufferedDMF at three typical pH values causing changes in the mechanism of the electrode process. The data obtained indicate the following scheme for the mechanism of the electrode process: (a) in the strongly acidic region: H+, e, H+, e; (b) in the intermediate region: H+, e, e, H+; (c) in the strongly alkaline region: e, H+, H+, e, H+, e.
    Type of Medium: Electronic Resource
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