Steric effects in substituted cyclobutadiene radical cations
β Scribed by Courtneidge, John L.; Davies, Alwyn G.; Parkin, James E.
- Book ID
- 121205379
- Publisher
- The Royal Society of Chemistry
- Year
- 1983
- Tongue
- English
- Weight
- 192 KB
- Volume
- 21
- Category
- Article
- ISSN
- 0022-4936
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π SIMILAR VOLUMES
The characteristic mass spectrometric fragmentation patterns of sterically congested stilbenes, phenyl-substituted 2,2,5,5-tetramethyl-3,4-diphenylhex-3-enes, are described. In contrast to stilbene, these sterically congested stilbenes show facile loss of tert-butyl and/or isobutene and phenyl, ulti
Tetra alkyl-substituted cyclobutadiene radical cations are TI-and not o-radicals. This can be concluded from the ESR spectra of the tetramethylcyclobutadiene radical cation at low temperatures, and from the 13C hyperfine splitting constants of the tetraethylcyclobutadiene radical cation. Alkyl-subst