| Publication Type |
Journal Article |
| Title |
ROTATIONAL-ISOMERISM IN 1,4-DIARYLBUT-2-ENE-1,4-DIONE RADICAL-ANIONS - AN ELECTRON-PARAMAGNETIC RESONANCE STUDY |
| Authors |
MLTMB FRANCO MCRLR LAZANA Bernardo J. Herold |
| Groups |
|
| Journal |
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS |
| Year |
1992 |
| Month |
July |
| Volume |
88 |
| Number |
14 |
| Pages |
1977-1983 |
| Abstract |
The radical anions of (Z)- and (E)-1,4-diarylbut-2-ene-1,4-diones 1-8 have been obtained by electrolytic reduction in dimethylformamide. Identical EPR spectra are recorded at room temperature for both the (Z)- and (E)-isomers evidencing rapid (Z)-(E) interconversion. Individual conformers are not observed for radical anions derived from either diphenyl, bis(p-tolyl) or bis(p-anisyl) derivatives 1.-6.- in the temperature range 223-298 K. Rapid interconversion between the possible conformers has been theoretically supported by INDO calculations. For the highly strained radical anion from the dimesityl compound 8.- three isomers with different g-values are distinguishable. The different isomers have also been assigned by means of INDO calculations. |
| DOI |
http://dx.doi.org/10.1039/ft9928801977 |
| ISBN |
|
| Publisher |
|
| Book Title |
|
| ISSN |
0956-5000 |
| EISSN |
|
| Conference Name |
|
| Bibtex ID |
ISI:A1992JE78000007 |
| Observations |
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