Trost, Barry M. ; Scudder, Paul H. ; Cory, Robert M. ; Turro, Nicholas J. ; Ramamurthy, V. ; Katz, Thomas J. (1979) 1,2-Diaza-2,4,6,8-cyclooctatetraene Journal of Organic Chemistry, 44 (8). pp. 1264-1269. ISSN 0022-3263
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Official URL: http://pubs.acs.org/doi/abs/10.1021/jo01322a017
Related URL: http://dx.doi.org/10.1021/jo01322a017
Abstract
1,2-Diazocine is prepared from 7,8 diazatetracyclo[3.3.0.02.4.03.6]oct-7-ene by four methods that excite the precursor into its tripl etstate of lowest energy. The 1H NMR spectrum shows its structure to be 2 and not 2a and its conformation to be 12. When heated it gives benzene and pyridine, and when irradiated with ultraviolet light it gives only benzene. Reasons are discussed why pyridine is formed in the one reaction and not in the other. The kinetics are recorded for the thermal reaction. Evidence that its double-bond and valence isomers are destabilized because lone pairs of electrons on adjacent nitrogens repel each other is sought in 2's reduction potential, but it can- not be recognized. Valence tautomers 7-11 are not detected in 2 by NMR spectroscopy.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Chemical Society. |
| ID Code: | 55544 |
| Deposited On: | 18 Aug 2011 11:34 |
| Last Modified: | 19 Aug 2011 06:07 |
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