Abstract
The gas-phase kinetic effects k/sub H//k/sub D/ for the hydrogen abstraction from some n-alkanes and cycloalkanes by hydrogen atoms, H + RH(R'D) K/sub H//k/sub D/ H/sub 2/(HD) + R(R'), were recently determined in their laboratory over the temperature range 363-463 K. The data are characterized by the small preexponential factor ratios A/sub H/A/sub D/ ranging from 0.43 to 0.54 and the large activation energy differences E/sub D/ - E/sub H/ from 9.0 to 9.7 kJ mol/sup -1/. Theoretical interpretation of the kinetic isotope effects was made for abstraction of a hydrogen atom from cyclohexane based on traditional transition-state theory. Some characteristics of the tunnel effect were discussed in some detail in an elementary way. Good agreement between experiment and theory was obtained when tunnel correction factors were taken into consideration.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
