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  • 1
    Electronic Resource
    Electronic Resource
    Protonic States in ChemistryExcerpts from this paper were given in a lecture to the annual meeting of DECHEMA, Frankfurt/main (Germany). 1962.Dedicated to Prof. Dr. G. Scheibe on the occasion of his 70th birthday (1964)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 3 (1964), S. 157-164 
    Details
    ISSN: 0570-0833
    Keywords: Protonic states ; Tunnel effect ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Protons are subject to the wave/particle dualism of matter. Hitherto, only the copruscular picture has been generally used in chemistry for describing protons. In contrast, the wave picture is considered in the present article. Protonic states, proton delocalization, and the tunnel effect in chemistry are discussed and illustrated by examples.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.196401571
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Protonic States and the Mechanism of Acid-Catalysed Esterification (1965)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 4 (1965), S. 40-49 
    Details
    ISSN: 0570-0833
    Keywords: Protonic states ; Esterification ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Protons can be very mobile in condensed phases; the length of time they are present in any one place is minute. The significance of proton mobility in the course of chemical reactions is considered in the case of acid-catalysed esterification by the normal carbonyl addition mechanism. - The properties of the protons in the carboxylic acid/alcohol system can be discussed on the basis of a semiconductor term diagram. The high mobility of the catalysing protons in the semiconductor system suggests that formation of the esterification intermediates occurs in two reaction steps which proceed at different rates. In the first rapid step the transition state is reached by proton transfers via hydrogen bridges. The proton rearrangement involved proceeds so rapidly that the heavy molecular skeletons retain their mutual spatial positions (Franck-Condon principle for proton-catalysed reactions). In the second slower step, the intermediate is formed by rearrangement of the groups of atoms. - Decomposition of the intermediate, with formation of either the starting materials or the end products, proceeds via a mechanism similar to that for the formation.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.196500401
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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