| DOI | Resolve DOI: https://doi.org/10.1021/j100341a094 |
|---|
| Author | Search for: Casal, H. L.1; Search for: Griller, D.1; Search for: Kolt, R. J.1; Search for: Hartstock, F. W.1; Search for: Northcott, D. M.1; Search for: Park, J. M.1; Search for: Wayner, D. D. M.1 |
|---|
| Affiliation | - National Research Council of Canada. NRC Institute for Chemical Process and Environmental Technology
|
|---|
| Format | Text, Article |
|---|
| Abstract | Photolysis of single crystals of urea/diacyl peroxide complexes at 10 K gave pairs of alkyl radicals that were separated by two molecules of carbon dioxide. At elevated temperatures the spectra became well-resolved as rotation of the radical centers became fast on the EPR time scale. The maximum resolution of the EPR hyperfine couplings was achieved when the separation between the radicals was greatest. The temperature for the onset of rapid rotation was markedly dependent on the length of the diacyl peroxide. Two radical rearrangements in the urea channels were studied: the cyclopropylmethyl ring opening and the 5-hexenyl radical cyclization. The former was virtually unaffected by the presence of the urea host while the cyclization of the 5-hexenyl radical showed a marked matrix effect. |
|---|
| Publication date | 1989-02-23 |
|---|
| In | |
|---|
| Language | English |
|---|
| Peer reviewed | Yes |
|---|
| NPARC number | 12338592 |
|---|
| Export citation | Export as RIS |
|---|
| Report a correction | Report a correction (opens in a new tab) |
|---|
| Record identifier | cd55f102-ac3a-446a-96b8-b13cd79bff5f |
|---|
| Record created | 2009-09-10 |
|---|
| Record modified | 2020-03-17 |
|---|
