Impact of upwardly revised Δ H f 0 of primary, secondary, and tertiary radicals on mechanistic constructs in thermal reorganizations
- 1 September 1981
- journal article
- Published by Proceedings of the National Academy of Sciences in Proceedings of the National Academy of Sciences
- Vol. 78 (9), 5279-5283
- https://doi.org/10.1073/pnas.78.9.5279
Abstract
Impetus for upward revision in the heats of formation of the ethyl (primary), isopropyl (secondary), and t-butyl (tertiary) free radicals has gained sufficient momentum in the last 6 yr to prompt an illustrative assessment of the far-ranging implications for interpretation of thermal reorganizations. Previous obstacles to consideration of diradicals as transition states in rearrangements of cyclopropanes and cyclobutanes are removed. The energetic relation of cyclohexa-1,4-diyl as an intermediate diradical in the Cope rearrangement to the transition state of a concerted mechanism is clarified.Keywords
This publication has 1 reference indexed in Scilit:
- Rotational propensities and identity of bond rupture in 1-cyano-2-methyl-3-( cis -propenyl) cyclopropanesProceedings of the National Academy of Sciences, 1980