Absolute rate constants for radical rearrangements in liquids obtained by muon spin rotation. Substituent effects on ring fission and cyclization reactions
✍ Scribed by Peter Burkhard; Emil Roduner; Hanns Fischer
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 565 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0538-8066
No coin nor oath required. For personal study only.
✦ Synopsis
By addition of the light hydrogen isotope muonium (Mu =w'e-) the, l-ethyl-hexen-1-yl radicals CH, = CHCH2CH2CH2CHCH2Mu, CH, = CHOCH,CH,CHCH,Mu, and CH, = CHCH2CH20CHCH,Mu are generated in liquids. Their Fourier transform muon spin rotation spectra show linewidths increasing with increasing temperature which are attributed to the ring closure reactions. Analysis yields the absolute rate constants and their Arrhenius parameters. Together with previously reported results on analogous cyclization and on related ring fission reactions they are discussed in terms of steric and electronic effects on the reaction pathways and compared with predictions of semiempirical calculations.