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Abstrakty
The kinetic parameters of the tritium exchange between H2 * S(D2 * S) or MeSH*(MeSD*) and MeOH(MeOD) vapours on PTFE and glass surface were measured. The *HH/*DD kinetic isotope effects are significantly lower than those for the reaction of phosphines with methanol. The kinetics of deuterium exchange between ButSH and EtOD in solutions of C6D12 and CD3CN had been studied and HH/DD isotope effect was evaluated. It appeared to be smaller than that in the vapours. These results suggest that contrary to the exchange reactions in phosphine, the elementary reaction of HH-transfer in four center transition state is not the rate limiting step and H-bond formation as well as diffusion controlled processes should be taken into account.
Słowa kluczowe
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Czasopismo
Rocznik
Tom
Strony
117--121
Opis fizyczny
Bibliogr. 11 poz., rys.
Twórcy
autor
- Department of Chemistry, Warsaw University, Żwirki i Wigury 101, 02-089 Warszawa, Poland
autor
- Department of Chemistry, Warsaw University, Żwirki i Wigury 101, 02-089 Warszawa, Poland
Bibliografia
- 1. Wawer A. and Wawer I., J. Chem. Soc. Perkin Trans. 2, 2045(1990).
- 2. Wawer A. and Szydłowski J., Polish J. Chem., 70, 1554 (1996).
- 3. Wawer A. and Szydłowski J., J. Radioanal. Nucl. Chem. Letters, 230, 303 (1998).
- 4. Wawer A., Dumkiewicz W. and Mendyk E.,Z Phys. Chem. (Leipzig), 269, 619 (1987).
- 5. Wawer I. and Wawer A., Z. Phys. Chem (Leipzig), 265, 757 (1984).
- 6. Wawer A. and Wawer I., Z Phys. Chem. (Leipzig), 267, 909 (1986).
- 7. Wawer A., React. Kinet. Catal. Letters, 19, 259 (1982). -
- 8. Wawer A. and Szydłowski J., Can. J. Chem., 61, 1060 (1983).
- 9. Caldin E.F. and Mateo S., J. Chem. Soc. Farad. Trans. 1,71, 1876 (1975).
- 10. Denisov G. S., Bureiko S. and Golubev N., in Molecular Interactions, eds. H. Ratajczak and W.J. Orville Thomas, Wiley, NY, 1981, and literature cited therein.
- 11. Szydłowski J., Isotope Exchange and Isotope Effects of Hydrogen in Hydrogen Bonded Systems, Warsaw University, Warsaw, 1982 (in Polish)
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BUJ1-0020-0014