Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published February 1973 | public
Journal Article

Rates of termination of radicals in solution. VII. Allylic radicals

Abstract

The rate constants for bimolecular decay of allyl, 2-methallyl, and cis- and trans-1-methallyl radicals in liquid propene, isobutene, and cis- and trans-2-butene, respectively, have been determined over a wide temperature range from near the boiling points of the solvents to about - 120° using the esr-rotating sector technique. The values, which range from 10^9 to 10^(10) M^(-1) sec^(-1), were compared with the encounter rate constants calculated from density and viscosity data. We conclude that the self-termination of allyl, 2-methallyl, and trans-1-methallyl radicals fits the diffusion-controlled model. However, the rate constant for the cis-1-methallyl radical is unexpectedly high at the higher temperatures. The viscosities of liquid propene, isobutene, and cis- and trans-2-butene between their boiling points and - 100° are reported.

Additional Information

© 1973 American Chemical Society. Received June 30, 1972. This work was supported by Grant No. AFOSR-7-1958 from the Directorate of Chemical Science, Air Force Office of Scientific Research.

Additional details

Created:
August 19, 2023
Modified:
October 20, 2023