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  • 1995-1999  (2)
  • (E)-2-methyl-2-pentenoic acid  (1)
  • Adiabatic capture  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Calculations of rate constants for reactions of first and second row cations (1997)
    Springer
    Theoretical chemistry accounts 98 (1997), S. 33-41 
    Details
    ISSN: 1432-2234
    Keywords: Key words: Rate constants ; Cation reactions ; Adiabatic capture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract. Calculations of rate constants for 35 reactions of first and second row monocations with different neutrals are presented. A combined rotationally adiabatic capture and centrifugal sudden approximation is used. The majority of predicted rate constants are in good agreement with the experimental measurements. An exploration of energetics of the potential energy surface for some of those cases in which prediction fails has been done using ab initio G2 theory. These cases usually correspond to situations in which the reaction is not as exothermic as the application of capture approximation requires or secondary barriers exist in the reaction path. Second row cations present these kind of problems due to their smaller electronegativity with respect to cations of the first row.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002140050275
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Stereoselective synthesis of dominicalure 1 and 2: Components of aggregation pheromone from male lesser grain borerRhyzopertha dominica (F.) (1996)
    Springer
    Journal of chemical ecology 22 (1996), S. 673-680 
    Details
    ISSN: 1573-1561
    Keywords: Pheromone ; Rhyzopertha dominica ; Coleoptera ; Bostrichidae ; dominicalure ; (S)-(+)-2-pentanol ; asymmetric reduction ; (E)-2-methyl-2-pentenoic acid ; (E)-2,4-dimethyl-2-pentenoic acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Dominicalure 1 (9a) and dominicalure 2 (9b), were synthesized by esterification of α,β-unsaturated acids4a and4b with (S)-(+)-2-pentanol (8). The key step was the asymmetric reduction of 3-penten-2-one (5) to give the chiral intermediate6, which, upon diimide reduction, DNB derivatization, recrystallization, and hydrolysis, yielded8 in 63% ee. Acids4a and4b were prepared in a simple and efficient three-step synthesis with an overall yield of 54% and 62%, respectively, in stereoisomerically pure form.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02033577
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    Paper (German National Licenses)
    Fulltext
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